Your Weekly Electronic Gardening Guide
Practical Horticulture for Busy People.
Sunflower
About This Plant...
Genus and species:Helianthus annuus
Plant type:warm-season annual
Height:15 inches to 8 feet or more
Location and soil:sun; rich soil
Uses:cutting, background, drying
Bloom time:summer
Color range:yellow, red
Indoor Sowing...
Time needed to reach transplant size:6 weeks
When to transplant to garden:after last spring frost
Outdoor Sowing...
When to sow outdoors:after last spring frost
Other Sowing Guidelines...
Approx. germination time:10-14 days
Germination temp.:70-85 degrees F.
Sowing Depth:1/4 inch
Needs light or dark to germinate:-
Transplanting Guidelines...
Spacing between plants:18 inches
Growing On...
Pests:
Diseases:
Growing tips:to prevent birds from getting to ripening seeds, harvest the heads when the bracts begin to dry, then hang them upside down in a shed or garage until dry