Blue Vervain
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SKU
AM018938
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Blue Vervain forms impressive spikes of tiny blue-violet flowers that rise above neighboring plants. This easy-to-grow perennial wildflower adds a lovely vertical accent without overpowering. With an extended bloom time, this native flower is an important food source for birds and pollinators when many summer flowers have passed. Blue Vervain also tolerates wet soil, for a beautiful addition to rain gardens.(Verbena)
| Zones | 3 - 8 |
|---|---|
| Advantages | |
| Light Requirements | |
| Mature Height | 24-48" tall (2-4 feet) , 12-30" wide |
| Bloom Time | Mid summer to early fall |
| SKU | AM018938 |
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).