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USDA Hardiness Planting Zones
To determine if a plant is sufficiently cold hardy, the USDA created numbered zones indicating winter low temperatures; the lower the zone number the colder the winter.
- If the coldest winter temperature expected in your area is -15°F (zone 5) then any plants rated zones 3-5 will survive the winter temperatures in your area.
- If you live in very warm winter areas (zones 9-11) plants with zones 3-4 ratings are not recommended. The lack of freezing winter temperatures do not provide a time for winter dormancy (rest).
Ratibida | Prairie Coneflower
A native perennial, Ratibida (Prairie Coneflower) is a native wildflower that adds swaths of color to the garden from mid to late summer. Valued for its long season bloom, these plants prefer full sun and are drought tolerant. They are willing re-seeders and wonderful to plant in sustainable landscapes where they will spread and naturalize.
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