Learn about several plant varieties and the planting information for each zone.
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Plant in well-drained soil
Plant in full sun
Deadhead to promote continued blooming; may reseed
May become covered with powdery mildew.
Space generously to allow for good air circulation
Height: 36 inches; Width: 12-18 inches
Annual in all zones (seems to die in fall no matter how warm):
Zones 2-8: Plant in spring after danger of frost has passed; collect seed in fall for planting the following spring; discard plants after killing frost.
Zones 9-11: Plant in spring or sow seeds in fall when ripe; discard plants in fall.