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1. Calochortus gunnisonii  - Sow at 65-75ºF, if no germination in 3 to 4 weeks, move to 30-39ºF for 4 weeks,then back to 68ºF

2. Cacalia atriplicifolia -  Start with 12 weeks at 32-39ºF, move to 68ºF for germination

3. Cacalia tuberosa - 12 weeks at 32-39ºF, move to 68ºF for germination

4. Calamagrostis arundinacea - Germination in less than two weeks at 68ºF,

5. Calamagrostis canadensis - Germination in less than two weeks at 68ºF,

6. Calamagrostis 'Karl foerster' - Germination in less than two weeks at 68ºF,

7. Calamintha grandiflora 'Elfin Purple'  First use 4 weeks at 70ºF,  then 5 weeks at 32-39º, after  move  up to 53-60º for germination in about two weeks.  Grow seedlings out cool (55-60ºF).

8. Calamintha nepeta - Lightly cover seeds, use F 65-70, germination in 7-14 days.

9. Calamintha sylvatica - First use 4 weeks at 70ºF,  then 5 weeks at 32-39º, after  move  up to 53-60º for germination in about two weeks.  Grow seedlings out cool (55-60ºF).

10. Calceolaria  biflora ’Goldcap’ - Surface sow the seeds and use 65-70F, germination in 7-18 days.

11. Calendula officinalis - sow outdoors, Germination in less than two weeks at 68ºF in dark,

12. Calliopsis bicolor - sow outdoors, Germination in less than two weeks at 55ºF,

13. Callirhoe involucrata - Germination in three to five weeks at 70F. Plant seedlings as soon as possible into their permanent spot- plants hate root disturbance.

14. Callistephus chinensis - Germination in less than two weeks at 68ºF,

15. Calluna vulgaris - Surface sow  seeds at 70ºF, germination  is irregular and spread out over many months.  Dry soils  will delay germination. Keep medium moist at all times and in bright light. Best results if the pot is kept in a plastic bag to maintain high humidity.

16. Caltha palustris -  Sow at 72ºF in muddy compost for 28 days move to 23ºF for 40 days, after which temperature should be raised gradually. or sow in the fall in a muddy slurry, keep temps above 60F for more than three weeks then allow to freeze-keep soil on the wet side as it freezes. Germination should occur in early spring.

17. Calycanthus floridus - 12 weeks at 32-39ºF, move to 68ºF for erratic germination

18. Camassia quamash - sow at 32-39ºF, germination erratic, often many months

19. Campanula alliarifolia -  Surface sow on moist seed medium and cover tray with glass or plastic. Germination spread out over 1-12 weeks at F 50. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

20. Campanula alpestris - sow seeds in a plastic bag with a table spoon of moist seed mix and allow to sit at room temp for 6 weeks, then move to the fridge for 6 weeks then to F65. for germination. Or sow in a pot and put in a plastic bag in a sheltered location out side for germination next spring.

21. Campanula americana - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

22. Campanula americana- Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-5 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

23. Campanula armeniaca - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-5 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

24. Campanula carpatica  - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

25. Campanula carpatica - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

26. Campanula carpatica - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

27. Campanula carpatica 'Bliss Blue'  Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-5 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

28. Campanula carpatica 'Light Blue Clips' Surface sow on moist  medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days keep out of very bright sun and dark nights.

29. Campanula carpatica 'Mixed Clips'  - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

30. Campanula carpatica 'Star Blue' Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

31. Campanula carpatica 'White Clips' - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-5 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

32. Campanula carpatica 'White Star' -  Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-5 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

33. Campanula carpatica 'White Uniform' -  Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-5 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

34. Campanula cochleariifolia ‘Pixie Blue'  Surface sow seeds onto moist seed mix and use F 45.  Germination is slow and spread out over many weeks.

35. Campanula cochleariifolia ‘Pixie Mix'  Surface sow seeds onto moist seed mix and use F 45.  Germination is slow and spread out over many weeks.

36. Campanula cochleariifolia 'Blue' - Surface sow seeds onto moist seed mix and use F 45.  Germination is slow and spread out over many weeks.

37. Campanula collina - Surface sow seeds onto moist seed mix and cover with plastic and place in the refrigerator (32-32-39F) for 6 weeks, then move to 70 ºF for germination. Or sow at 65-70F and put the pot in a plastic bag with germination spread out over many weeks.

38. Campanula divaricata - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

39. Campanula 'Divine Lavender' -Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-6 weeks at F65-75. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

40. Campanula fenestrellata - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-6 weeks at F55-65. It is helpful to use lighted days (but keep out of very bright light) and dark nights. If no germination use 4 weeks at 32-39F.

41. Campanula garganica 'Major' - sow seeds in a plastic bag with a table spoon of moist seed mix and allow to sit at room temp for 6 weeks, then move to the fridge for 6 weeks then to F65. for germination. Or sow in a pot and put in a plastic bag in a sheltered location out side for germination next spring.

42. Campanula glomerata - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

43. Campanula glomerata acaulis - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-6 weeks at F55-65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

44. Campanula glomerata 'Superba'  - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

45. Campanula glomerata 'White'  - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

46. Campanula lactiflora 'Dwarf Pink' -Sow at 70ºF, germination starts in one to three weeks. Cover with glass or plastic. If seeds have not germinated well after four weeks- move to the refrigerator (32-39F)for three weeks then back 70 F.

47. Campanula lactiflora 'New Hybrids' -Sow at 70ºF, germination starts in one to three weeks. Cover with glass or plastic. If seeds have not germinated well after four weeks- move to the refrigerator (32-39F)for three weeks then back 70 F.

48. Campanula latiflora ‘Alba' -Sow at 70ºF, germination is spread out over a month or two. Cover pots with glass or plastic to keep the soil moist and humidity up. Light helps with germination.

49. Campanula latiflora 'Blue' - Sow at 70ºF, germination is spread out over a month or two. Cover with glass or plastic.

50. Campanula latifolia  v. macrantha - Surface sow seeds, light needed for best results.,If no germination after four weeks - move to the refrigerator 32-39F.  for 4 to 6 weeks then back 68ºF.

51. Campanula medium 'Calycanthema' - Germination in two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

52. Campanula medium 'Tall Single White' - Germination in two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

53. Campanula patula - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-6 weeks at F40-55. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

54. Campanula persicifolia - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

55. Campanula persicifolia alba - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

56. Campanula persicifolia 'Grandiflora Blue' - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-4 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

57. Campanula persicifolia 'Grandiflora White'  Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-4 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

58. Campanula persicifolia 'Telham Beauty' - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-8 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

59. Campanula portenschlagiana  -  Sow as thin as possible and do not cover. Use 50-60F, germination is spread out over many weeks. Cover pots with clear plastic or glass.

60. Campanula poscharskyana - Surface sow  seeds at 70ºF, if no germination in 4 weeks, move to fridge for 3 weeks, Germination is spread out over a number of weeks. Its very helpful to cover with plastic or glass to keep the humidity up and the medium from drying out during germination.

61. Campanula prim..  'Blue Oasis' - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F60.

62. Campanula punctata 'Rubriflora'  Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

63. Campanula 'Rock Garden Mix'  -Sow at 50-65ºF, germination is spread out over a few months. Cover pots with glass or plastic to keep the soil moist and humidity up. Light helps with germination.

64. Campanula rotundifolia 'Olympica' - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-8 weeks at F65-75. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

65. Campanula rotundifolia 'White Gem' - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-6 weeks at F65-75. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

66. Campanula saxifraga  Surface sow seeds, light needed for best results., and use 45-58F. If no germination after four weeks - move to the refrigerator 32-39F.  for 4 to 6 weeks then back 58ºF.

67. Campanula sibirica - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

68. Campanula takesimana - Surface sow in a square pot with moist seeds mix, keep at room temps and cover with plastic. After two weeks (if no germination) move to the refrigerator (25-38F) for three weeks then to 55ºF for germination.  1-5 weeks.

69. Campanula tommasiniana - Surface sow in a square pot with moist seeds mix, keep at room temps and cover with plastic. After two weeks move to the refrigerator for five weeks then to 55ºF for germination.  1-5 weeks.

70. Campanula trachelium - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-8 weeks at F65. It is helpful to use lighted days (but keep out of very bright light) and dark nights.

71. Campanula trachelium/Adenophora lilifolia mix - Surface sow on moist seed medium and cover tray with glass or plastic. Germination in 1-3 weeks at F60.  The Adenophora germinates from 1-8 weeks.

72. Campsis radicans -   Sow and cover with moist seed medium and use 8 weeks at 32-39ºF, move to 68º for germination over many weeks.

73. Campsis x tagliabuana - Sow and cover with moist seed medium and use 8 weeks at 32-39ºF, move to 68º for germination over many weeks.

74. Capsicum annuum - Germination in less than two weeks at 68ºF,

75. Capsicum annuum - Germination in less than two weeks at 72ºF .  Surface sow seeds, light needed for best results.,

76. Capsicum annuum - Germination in less than two weeks at 72ºF .  Surface sow seeds, light needed for best results.,

77. Caragana arborescens - nick coat, 2 weeks at 32-39ºF, move to 68ºF

78. Cardiocrinum giganteum - Sow at 64-75ºF for 4 weeks, move to 24-32-39ºF for 5 weeks,  then move to 41-60ºF for germination.

79. Carex grayi -  First use 4 weeks at 68ºF, then 4 weeks at 32-39º, move to 53º for germination,  Germination can be spread out over three years.   So keep seeds moist , surface sow - light needed.

80. Carex lurida-  First use 4 weeks at 68ºF, then 4 weeks at 32-39º, move to 53º for germination,  Germination can be spread out over three years.   So keep seeds moist , surface sow - light needed.

81. Carex trifida -  First use 4 weeks at 68ºF, then 4 weeks at 32-39º, move to 53º for germination,  Germination can be spread out over three years.   So keep seeds moist , surface sow - light needed.

82. Carum carvi - sow outdoors, Germination in less than two weeks at 68ºF,

83. Caryopteris bungeii - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

84. Caryopteris incana - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

85. Cassia marilandica - Soak seeds in warm water for 24 hours, lightly cover seeds, germination is spread out over a few weeks up to a year.

86. Castilleja miniata - Surface sow seeds onto moist seed mix and cover with plastic and place in the refrigerator for 6 weeks, then move to 70 ºF for germination. Or sow with a table spoon of moist (not wet) seed medium in a plastic bag and place in the fridge.

87. Catalpa speciosa - sow outdoors, Germination in less than two weeks at 68ºF,

88. Catananche caerulea - Germination in less than two weeks at 68ºF,

89. Catananche caeruleum 'Alba' - Lightly cover seeds and use F70, germination 7-20 days.

90. Catananche caeruleum 'Amor Blue'- Lightly cover seeds and use F70-78, germination 7-20 days.

91. Caulophyllum thalictroids -  Multiple cycles of warm and cold stratification needed; Scratch seeds with a nail- impermeable seed coat.

92. Cedronella canariensis - Germination in less than two weeks at 68ºF,

93. Celosia plumosa - Germination in less than two weeks at 75ºF .  Surface sow seeds, light needed for best results.,

94. Celosia 'Sparkler Mix' - Sow into a hot sunny location after the soil temps are above 75ºF, thin out seedlings, does not transplant very well.

95. Centaurea cyanus - sow outdoors, Germination in less than two weeks at 68ºF in dark,

96. Centaurea dealbata -  Sow at 70ºF, cover completely- darkness is helpful. Germination is spread out over a month or two. Might be helpful to soak the seeds in warm water for 30 hours before sowing.

97. Centaurea dealbata - Germination in less than two weeks at 68-78ºF,  Cover seeds 1/5 inch deep. Darkness helps with germination.

98. Centaurea macrocephala - Germination in less than two weeks at 68ºF,

99. Centaurea montana -  Sow at 70ºF, cover completely- darkness is helpful. Germination is spread out over a month or two. Might be helpful to soak the seeds in warm water for 12 hours before sowing.

100. Centaurea montana alba -  Sow at 70ºF, cover completely- darkness is helpful. Germination is spread out over a month or two. Might be helpful to soak the seeds in warm water for 12 hours before sowing.

101. Centaurea moschata  - Germination in less than two weeks at 68ºF,

102. Centaurea nigra Germination takes longer than2 weeks at 68ºF, slow germination

103. Centaurea orientalis -  Sow at 70ºF, cover completely- darkness is helpful. Germination is spread out over a month or two. Might be helpful to soak the seeds in warm water for 30 hours before sowing.

104. Centaurea phrygia - Germination in less than two weeks at 68ºF, erratic germination

105. Centaurea pulcherrima  -  Sow at 70ºF, cover completely- darkness is helpful. Germination is spread out over a month or two. Might be helpful to soak the seeds in warm water for 30 hours before sowing.

106. Centaurea scabiosa  -  Sow at 70ºF, cover completely- darkness is helpful. Germination is spread out over a month or two. Might be helpful to soak the seeds in warm water for 30 hours before sowing.

107. Centranthus ruber albus -  Lightly cover seeds and use  F 70. Germination  starts in 3-4 weeks and may be spread out over a few weeks.

108. Centranthus ruber 'Coccineus' -  Lightly cover seeds and use  F 70. Germination in 3-4 weeks  and may be spread out over a few weeks.

109. Centranthus ruber 'roseus'  - Lightly cover seeds and use 70ºF, germination in 5-20 days.

110. Centranthus rubra 'albiflorus' - Lightly cover seeds and use 70ºF, germination in 5-20 days.

111. Cephalanthus occidentalis - Germination in less than two weeks at 68ºF,

112. Cephalaria alpina -  Use cool temps, some were around  41ºF, germination irregular, often taken place over a month or two.

113. Cephalaria gigantea -  Sow at 70ºF , if no germination in 3-4 weeks, move to fridge for 4 - 5 weeks. Or start off in a plastic bag with 1tbs of moist seed medium  in the fridge for 4 weeks.

114. Cephalaria leucantha - Use cool temps, some were around  41ºF, germination irregular, often taken place over a month or two.  Or start off in a plastic bag with 1tbs of moist seed medium  in the fridge for 4 weeks., then sow and use 60F.

115. Cerastium arvense -  Sow on the surface at 70ºF, light needed for best germination. 5-15 days.  If no germination after three weeks move to 32-39F for four weeks.

116. Cerastium biebersteinii - Germination in less than two weeks at 68ºF, Surface sow seeds, light needed for best results.,

117. Cerastium candidissimum-  Sow on the surface at 70ºF, light needed for best germination. 5-15 days.  If no germination after three weeks move to 32-39F for four weeks.

118. Cerastium tomentosum columnae 'Silver Carpet' - Germination in less than two weeks at 65ºF .  Surface sow seeds, light needed for best results.,

119. Cerastium tomentosum 'Silver Carpet' -  Sow on the surface at 70ºF, light needed for best germination. 5-15 days.

120. Chaenomeles japonica - wash seed, sow outdoors, 2-4 weeks at 68ºF, 4-6 weeks at 21ºF, move to 53ºF for germination

121. Chamaemelum nobile - Germination in less than two weeks at 68ºF,

122. Chasmanthium latifolium - Germination in less than two weeks at 68ºF,  Very lightly cover seeds.

123. Cheiranthus allionii - Germination in less than two weeks at 68ºF,

124. Chelidonium majus - 6 weeks at 68F, 8 weeks at 32-39ºF, raise to 53º slowly, recycle

125. Chelone glabra - 2-4 weeks at 68ºF .  Surface sow seeds, light needed for best results., indefinite weeks at 32-39ºF

126. Chelone 'Mixed' -Start with 2-4 weeks at 68ºF .  Surface sow seeds, light needed for best results., indefinite weeks at 32-39ºF

127. Chelone obliqua - 2-4 weeks at 68ºF .  Surface sow seeds, light needed for best results., indefinite weeks at 32-39ºF

128. Chenopodium ambrosioides - Germination in less than two weeks at 75ºF,

129. Chenopodium quinoa - Germination in less than two weeks at 68ºF,

130. Chrysanthemum : leucanthemum ' Snowdrift' - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

131. Chrysanthemum : leucanthemum 'Silver Spoons' - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.,

132. Chrysanthemum coccineum 'Duplex Mix' -  Surface sow, light helps with germination.  7-12 days at F70.

133. Chrysanthemum coccineum 'James Kelway' - Surface sow seeds, light needed for best germination, use 65F, germination in 10-18 days.

134. Chrysanthemum F1 hybrid  'Snow Lady' - Germination in less than two weeks at 65-68ºF .  Surface sow seeds, light needed for best results.,

135. Chrysanthemum indicum ‘Eriso’ Surface sow seeds, light needed for best germination, use 70F, germination starts in 10-18 days and is spread out over a number of weeks.

136. Chrysanthemum indicum ‘Fanfare’ Surface sow seeds, light needed for best germination, use 70F, germination starts in 10-18 days and is spread out over a number of weeks.

137. Chrysanthemum indicum ‘Fashion Red' Surface sow seeds, light needed for best germination, use 70F, germination starts in 10-18 days and is spread out over a number of weeks.

138. Chrysanthemum maximum 'Polaris'  Surface sow, light helps with germination.  7-12 days at F70.

139. Chrysanthemum maximum 'Prieure'  Surface sow, light helps with germination.  7-12 days at F70.

140. Chrysanthemum maximum 'Snow Drift' - Surface sow, light helps with germination.  7-12 days at F70.

141. Chrysanthemum weyrichii -  Use 3 or 4 weeks at 68-75ºF, if no germination, 4 weeks at 32-39ºF, then back to  68-75.ºF

142. Chrysanthemum X grandiflorum 'Spray Mixed Hybrids' - Surface sow seeds, light needed for best germination, use 70F, germination in 10-18 days.

143. Chrysopsis villosa - 3-4 weeks at 68ºF, if no germination, 2-4 weeks at 32-39ºF, then 68ºF

144. Chrysopsis villosa - 3-4 weeks at 68ºF, if no germination, 2-4 weeks at 32-39ºF, then 68ºF

145. Cichorium intybus -Surface sow seeds, germination 1 to 4 weeks at 65-75F.

146. Cimicifuga racemosa cordifolia  - Start off with 16 weeks at 68-75ºF, move to 25-35º indefinitely, germination is spread out over two years.  Best if moved out side  during winter for the cold period.

147. Cimicifuga ramosa  'Atropurpurea'  Start off with 16 weeks at 68-75ºF, move to 25-35º indefinitely, germination is spread out over two years.  Best if moved out side  during winter for the cold period.

148. Cimicifuga ramosa  'Atropurpurea'  Start off with 16 weeks at 68-75ºF, move to 25-35º indefinitely, germination is spread out over two years.  Best if moved out side  during winter for the cold period.

149. Cineraria maritima - Germination in less than two weeks at 74ºF .  Surface sow seeds, light needed for best results.,

150. Citrullus lanatus - sow outdoors, Germination in less than two weeks at 71ºF,

151. Clarkia amoena. - Sow outdoors in situ , Germination in less than two weeks at 68ºF,

152. Clarkia elegans - Germination in less than two weeks at 68ºF,

153. Clematis alpina -  Germination in 20-30 days at 55 F. nights and 72 F. days. Darkness helps, so cover seeds completely when sowing.  The seeds  that do not germinate in response to the above regime, move to 35 F  for three weeks.

154. Clematis heracleifolia- Sow seed into a plastic bag with moist seed mix and keep at 60-70ºF for 3 weeks, move to the fridge (30-37ºF) for 6 weeks, then move to 50F were germination should occur over a few weeks.

155. Clematis hirsutissima - Try 20-30 days at 50-55 F. nights and 68-78 F. days. Darkness helps, so cover seeds completely when sowing.  The seeds  that do not germinate in response to the above regime, move to 29-35 F  for 12 weeks. Germination can be spread out over a few months.

156. Clematis integrifolia - Sow seed into a plastic bag with moist seed mix and keep at 60-70ºF for 3 weeks, move to the fridge  for 6 weeks, then move to 50F were germination should occur.

157. Clematis macropetala 'Mixed Hybrids'  - Germination in 20-30 days at 55 F. nights and 72 F. days. Darkness helps, so cover seeds completely when sowing.  The seeds  that do not germinate in response to the above regime, move to 35 F  for three weeks.

158. Clematis mandschurica - Sow seed into a plastic bag with moist seed mix and keep at 60-70ºF for 3 weeks, move to the fridge for 6 weeks, then move to 50F were germination should occur.

159. Clematis potaninii - Germination in 20-30 days at 50-55 F. nights and 68-78 F. days. Darkness helps, so cover seeds completely when sowing.  The seeds  that do not germinate in response to the above regime, move to 29-35 F  for 6 weeks. Germination can be spread out over a few months.

160. Clematis recta 'Alba' - Germination in 20-30 days at 50-55 F. nights and 68-78 F. days. Darkness helps, so cover seeds completely when sowing.  The seeds  that do not germinate in response to the above regime, move to 29-35 F  for 9 weeks. Germination can be spread out over a few months.

161. Clematis tangutica 'Radar Love' - Germination in 20-30 days at 55 F. nights and 72 F. days. Darkness helps, so cover seeds completely when sowing.  The seeds  that do not germinate in response to the above regime, move to 35 F  for three weeks.

162. Clematis vitalba - Sow seed into a plastic bag with moist seed mix and keep at 60-70ºF for 3 weeks, move to the fridge (30-37ºF) for 6 weeks, then move to 50F were germination should occur over a few weeks.

163. Clematis x hybrida 'Helios' - Germination in 20-30 days at 55 F. nights and 72 F. days. Darkness helps, so cover seeds completely when sowing.  The seeds  that do not germinate in response to the above regime, move to 29-38 F  for four weeks.

164. Cleome hasslerana - surface sow outdoors in the fall for spring germination

165. Clinopodium vulgare - Germination in less than two weeks at 72ºF,

166. Cobaea scandens 'Key Lime' - Cover seeds and use 75-80F, germination in 14-20 days.

167. Codonopsis clematidea (1) Use 4 weeks at 68ºF, if no germination., use 4 weeks at 32-39ºF, then back to 68ºF.  Germination starts in 10 days normally- lightly cover seeds.

168. Coffee arabica - Soak seeds in warm water for 24 hours - Sow and use 75F (Bottom Heat is helpful) germination in 2-3 weeks.

169. Coix lacryma-jobi - Germination in less than two weeks at 68ºF,

170. Coleus 'Care Free Mix' - Surface sow seeds and use 70F.  Once seeds germinate in 10-18 days, use 60-65 F to grow the seedlings out.

171. Convallaria majalis  -  Sow at 64-75ºF for 4 wkees, move to -4 to 24-39ºF for 6 weeks, then  move to 45-55ºF for germination which can be spread out over 15 months, Best to sow and keep outside for germination next year.

172. Convovulvus cantabrica - Soak Seeds in hot water for 24 hours.  Sow and cover 1/8 inch deep and use 45-55F.  Germination in 5-14 daysand nay be spread out over many weeks.

173. Convovulvus 'Royal Ensign' - Soak Seeds in hot water, let soak for 24 hours.  Sow and cover 1/8 inch deep and use 75-80F.  Germination in 5-14 days. Plants do not like air temps below 50 F.

174. Coreopsis auriculata nana  -Surface sow seeds, light needed for best germination. Use 65F, 5-45 days

175. Coreopsis basalis 'Sunshine' - Surface sow seeds, light needed for best germination,. Use 65F, 5-20 days.

176. Coreopsis grandiflora 'Baby Sun' - Surface sow seeds, light needed for best germination,. Use 65F, 5-20 days.

177. Coreopsis grandiflora 'Domino' - Surface sow seeds, light needed for best germination,. Use 68-78F, 5-21 days.

178. Coreopsis grandiflora 'Double Sunburst' - Surface sow seeds, light needed for best germination,. Use 68-78F, 5-21 days.

179. Coreopsis grandiflora 'Early Sunrise'  -Surface sow seeds, light needed for best germination. Use 65F, 5-20 days

180. Coreopsis grandiflorum - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results., , may benefit from kno3

181. Coreopsis lanceolata  'Brown Eyes' - Surface sow seeds, light needed for best germination,. Use 65F, 5-20 days.

182. Coreopsis lanceolata - Germination in less than two weeks at 66-75ºF .  Surface sow seeds, light needed for best results.

183. Coreopsis lanceolata 'Double Sunburst' - Germination in less than two weeks at 66-75ºF .  Surface sow seeds, light needed for best results.

184. Coreopsis lanceolata 'Sterntaler'- Germination starts in less than two weeks at 66-75ºF .  Surface sow seeds, light needed for best results.  Germination can be spread out over a few weeks.

185. Coreopsis rosea 'American  Dream' - Surface sow seeds, light needed for best germination. Use 65F, 5-45 days. Germination is spread-out over many weeks.

186. Coreopsis tinctoria  'Dwarf Yellow' - Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.

187. Coreopsis tinctoria  'Radiata Mix' Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results.

188. Coreopsis tinctoria ''Dwarf Red' -  Germination in less than two weeks at 68ºF .  Surface sow seeds, light needed for best results

189. Coreopsis tripteris - Surface sow seeds, light needed for best germination. Use 65F,  Germination starts in 5-65 days. and is spread out over a few months.

190. Coriandrum sativum - sow outdoors, Germination in less than two weeks at 60ºF in dark,

191. Cornus racemosa - Keep seeds at room temp for three months then move to fridge for three months. Sow and germination should occur in 1-2 months.

192. Coronilla varia - surface sow seeds and use 70F, germination starts in three weeks.

193. Cortaderia selloana 'Pink' - Surface sow seeds and use 70-80F, germination in 10-20 days. Water from below.

194. Cortusa matthioli - Germination takes longer than2 weeks at 68ºF, slow germination

195. Corydalis curvisiliqua - sow outdoors, 2-4 weeks at 68ºF, 4-6 weeks at 32-39º, move to 53º for germination

196. Corydalis lutea -  Sow in a plastic bag with moist seed mix and keep at 71ºF for 6 weeks. Move to the fridge for 6-8 weeks. Then raise the temperature to 45-50ºF. If no germination in 4-6 weeks, repeat the cycle from the beginning. If the warm/cold cycles were not long enough, a new warm/cold cycle is needed.

197. Corydalis lutea - 2-4 weeks at 68ºF, 4-6 weeks at 32-39º, move to 53º for germination

198. Corydalis sempervirens 'Alba' - Sow at 70ºF, germination is in one to three weeks. Cover with glass or plastic. If seeds have not germinated well after four weeks- move to the refrigerator for three weeks then back 70F.

199. Cosmos bipinnatus 'Pied Piper Red' - Cover seeds and use 75-80.F, germination in 2 weeks. Often best to direct sow.

200. Cosmos bipinnatus 'Psycho White'  Cover seeds and use 75-80.F, germination in 2 weeks. Often best to direct sow.

201. Cosmos bipinnatus 'Tetra Giants Versailles Red' - Cover seeds and use 75-80.F, germination in 2 weeks. Often best to direct sow.

202. Cotinus coggyria - Soak seeds in hot water for 36 hours. change the water with fresh hot water every 12 hours.  use 12 weeks at 32-39ºF, move to 53º for germination

203. Cotoneaster acutifolius - Soak seeds in hot water for 36 hours. chang the water with fresh hot water every 12 hours, Sow outdoors in fall, slow germination up to 18 months

204. Cotoneaster horizontalis - Soak seeds in hot water for 36 hours. chang the water with fresh hot water every 12 hours, Sow outdoors in fall, slow germination up to 18 months

205. Crambe cordifolia - Soak seeds in hot water -for 2 days- changing the water with fresh hot water every 12 hours. Cover seeds lightly and use 40-55F, germination is spread out over a few months.

206. Crocosmia sp ex 'lucifer' - Germination takes longer than2 weeks at 68ºF, slow germination

207. Cucumis melo - sow outdoors, Germination in less than two weeks at 75ºF,

208. Cucumis metuliferus - Germination in less than two weeks at 75ºF,

209. Cucumis sativus - sow outdoors, Germination in less than two weeks at 72ºF,

210. Cucurbita maxima - Germination in less than two weeks at 72ºF,

211. Cucurbita maxima - Germination in less than two weeks at 72ºF,

212. Cucurbita moschata - sow outdoors, Germination in less than two weeks at 72ºF,

213. Cyclamen coum 'Rubrum'  - Soak seedsfor 24 hours in warm water. Sow and cover very lightly, use 64F, and keep moist but not wet.

214. Cyclamen persicum giganteum - Constant 80ºF soak, sow at 60ºF in the dark

215. Cymbalaria muralis  - Germination 7 to 21 days  at 72ºF

216. Cynoglossum officinale - Sow at 32-39ºF, germination erratic, often one year

217. Cyperus papyrus - Germination in less than two weeks at 75ºF .  Surface sow seeds, light needed for best results.,

218. Cyphomandra casana- Germination in less than two weeks at 68ºF,

219. Cytissus sp - nick and soak, 3-4 weeks at 68ºF, if no germination., 2-4 weeks at 32-39ºF, then 68ºF

220. Cytisus purpureus - nick and soak, Germination takes longer than2 weeks at 68ºF, slow germination