Hypericum perforatum, known as St John’s wort, is a flowering plant in the family Hypericaceae. The common name “St John’s wort” comes from its traditional flowering and harvesting on St John’s Day, 24 June. The genus name Hypericum is derived from the Greek words hyper (above) and eikon (picture), in reference to the tradition of hanging plants over religious icons in the home during St John’s Day, to ward off evil.
Growing Zones: 3-8
Mature Height: 18-24 inches
Mature Width: 12-15 inches
Sowing: Start indoors in pots 10-12 weeks before the last frost or sow directly outside in the Fall. Barely cover seed. Needs light to germinate.
Sow depth: ¼ in
Days to Germinate: 10-20 @ 60F
Special Maintenance: Germination is enhanced by moist chilling at 38 degrees for 2 months.
Sunlight: Full sun, Part Sun
Soil Type: Average
Drought Tolerance: Good
Growth Rate: Moderate
Bloom Time: Summer, June-July
Bloom Description: Yellow
Harvest: Flower, Flowering Tops
Harvest Time: Summer, June-July
Special Properties: Bees, Butterflies, Pollinators, Deer resistant