1. CACTI - Cactus

 CACTI  Cactus  Zones 9 to 10  kak’ti  Potted Plant  Moderate Cactaceae; native to the Americas. Germination: Start indoors any time of the year, maintaining a temperature of 70-75° F during germination. Leave smaller seed types uncovered;...

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2. CALCEOLARIA crenatiflora - Pocketbook Plant, Pouch Flower

 CALCEOLARIA crenatiflora  Pocketbook Plant, Pouch Flower    kal-se-o-lar’-ri-å cren-at-i-flor’a  Pot Plant  Moderate Scrophulariaceae; native to Chili and Peru. Germination: For best results, sow indoors in fall for winter and spring...

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3. CALENDULA officinalis - Pot Marigold

 CALENDULA officinalis  Pot Marigold    ka-len’du-la o-fi-shi-na’lis  Annual  Easy Asteraceae; native to southen Europe. Germination: Sow outdoors in spring in any climate. Or, in cool climates, sow indoors in spring for summer use; in...

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4. CALLISTEPHUS chinensis - Aster, China Aster

 CALLISTEPHUS chinensis  Aster, China Aster    kal-i’ste-fus chi-nen’sis  Annual  Easy Asteraceae; native to China. Germination: Sow outdoors after all danger of frost is past, or sow indoors 6-8 weeks before planting outside. Sow indoors...

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5. CALLUNA vulgaris - Heather

 CALLUNA vulgaris  Heather  Zones 4 to 6  ka-lu’na vul-gar’is  Perennial  Challenging Ericaceae; native of northern Europe. Germination: Sow outdoors in late fall for early spring germination, or sow indoors. Fresh seeds will germinate in...

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6. CAMELLIA species - Camellia

 CAMELLIA species  Camellia  Zones in text below  ka-mel’e-å  Perennial   Theaceae; native to Asia. Germination: Soak seeds of C. sasanqua in warm water for 24 hours before sowing. Maintain a temperature within the medium of 70-75° during...

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7. CAMPANULA species - Bellflower

 CAMPANULA species  Bellflower  Zones 3 to 7  kam-pan’u-å  Biennial, Perennial, Annual  Moderate Campanulaceae; native to Asia and Europe. Germination: Annual - Sow indoors 6 to 8 weeks before planting outdoors and maintain a temperature of...

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8. CAMPANULA species - Bellflower

 CAMPANULA species  Bellflower  Zones 3 to 7  kam-pan’u-å  Biennial, Perennial, Annual  Moderate Campanulaceae; native to Asia and Europe. Germination: Annual - Sow indoors 6 to 8 weeks before planting outdoors and maintain a temperature of...

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9. CAMPANULA species - Bellflower

 CAMPANULA species  Bellflower  Zones 3 to 7  kam-pan’u-å  Biennial, Perennial, Annual  Moderate Campanulaceae; native to Asia and Europe. Germination: Annual - Sow indoors 6 to 8 weeks before planting outdoors and maintain a temperature of...

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10. CAMPSIS radicans - Trumpet Vine

 CAMPSIS radicans  Trumpet Vine  Zones 5-9  kamp’-sis  Perennial   Bignoniaceae; native to Northeast North America. Germination: Place seeds in moistened medium in the refrigerator for two months, followed by germination maintaining a...

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