Columbine - Key Growing Information
DAYS TO GERMINATION: 21-28 days at 70-75°F (21-24°C). Refrigerate seed for 5 days prior to planting. Light aids germination. Outdoors, soil temperature must be above 65°F.
SOWING: Transplant (recommended) - Sow 8-10 weeks before last frost. Transplant out after last frost. Barely cover seed as light aids germination. Transplant to larger containers or cell packs when first true leaves appear. Direct seed - Sow once soil has warmed to 65°F (18°C). Sow directly into seed bed in groups of 3-4 seeds. Thin to one plant when true leaves appear. Winter mulching in cold climates, after the first frost is recommended to protect plants from heaving with the freeze and thaw cycles.
LIGHT PREFERENCE: Part Shade. Will tolerate full sun where summers are cool and plants can be kept watered.
PLANT HEIGHT: Varies.
PLANT SPACING: 10-15".
HARDINESS ZONES: Zones 3-9.
HARVEST: When half of the florets on a stem are open.
SOIL REQUIREMENTS: Prefers light shade and humus-rich, well-drained soil. Will tolerate full sun where summers are cool and plants can be kept watered.
USES: Cut Flower. Beds and borders.
SCIENTIFIC NAME: Aquilegia spp.