Blue Vervain is easily grown in average, medium –wet soils in full sun. Plants will easily self seed in optimum growing conditions.
Growing Zones: 4-9
Mature Height: 5-6 feet
Mature Width: 12-15 in
Sowing: Start indoors in pots 6-8 weeks before the last frost. Barely cover seed. Needs warmth and light to germinate. Cold stratify seed 2 weeks prior to indoor planting.
Sow depth: ¼ in
Days to Germinate: 21-28 @ 60F
Special Maintenance: Germination is enhanced by moist chilling at 38 degrees for 2 weeks. A quick alternative to moist chilling is to place seed in paper towel, moisten towel and then place in freezer for a day or two.
Sunlight: Full sun
Soil Type: Average
Drought Tolerance: Good
Growth Rate: Moderate
Leaf Description: Slender, toothed edge
Bloom Time: Late Summer-Fall, August – September
Bloom Description: Purple, spikey
Harvest: Leaf, Flower, Flowering Tops
Harvest Time: Late Summer-Fall, August – September
Special Properties: Deer resistant