Your Weekly Electronic Gardening Guide
Practical Horticulture for Busy People.
Cosmos
About This Plant...
Genus and species:
Cosmos sulphureus; Cosmos bipinnatus
Plant type:
warm-season annual
Height:
1-2 feet (C. sulphureus); 3-5 feet (C. bipinnatus)
Location and soil:
sun; tolerates poor soil
Uses:
cutting, bedding, border, background
Bloom time:
late spring-early fall
Color range:
orange, yellow (C. sulphureus); pink, red, white (C. bipinnatus)
Indoor Sowing...
Time needed to reach transplant size:
4 weeks
When to transplant to garden:
after last heavy spring frost
Outdoor Sowing...
When to sow outdoors:
after last heavy spring frost
Other Sowing Guidelines...
Approx. germination time:
15 days
Germination temp.:
75-80 degrees F.
Sowing Depth:
1/8 inch
Needs light or dark to germinate:
-
Transplanting Guidelines...
Spacing between plants:
12 inches
Growing On...
Pests:
Diseases:
Growing tips:
tall varieties need staking; tolerates light frost
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