Learn about several plant varieties and the planting information for each zone.
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Usually grown as an annual in all zones
Plant in moist, but well-drained soil; water when dry
Plant in full sun
Height: 6 inches; Length: to 48 inches or more
Annual in USDA zones 2-9
Hardy in USDA zones 10-11:
Zones 2-9: Plant in spring after danger of frost has passed; fertilize with water-based fertilizer twice monthly during growing season; cut back foliage and dig tubers for indoors before frost or discard plants after killing frost.
Zones 10-11: Plant in spring; mulch in fall; prune away old foliage in early spring; fertilize twice monthly during spring and summer.