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key growing information
How to Grow Agrostemma (Corn-Cockle)
Growing agrostemma (corn cockle) from seed: when and how deep to sow, spacing, succession sowing for a longer bloom season, sun and soil needs, and when to cut.
By Hensley’s Seed Co.
Agrostemma - Key Growing Information
DAYS TO GERMINATION:
Usually 7–14 days at 60–70°F (16–21°C).
SOWING:
Sowing in place works best: plant as early in spring as the ground can be worked, 1/8" deep, and thin seedlings to 6–9" apart once they have true leaves. For transplants, start seed indoors 4–5 weeks ahead of the last frost. Repeat sowings every 2–3 weeks until midsummer to keep flowers coming. Agrostemma prefers cool conditions; a sowing made in early May generally flowers from July into August.
LIGHT PREFERENCE:
Full sun.
PLANT HEIGHT:
24-36".
PLANT SPACING:
Space 6–9" apart.
HARDINESS ZONES:
Grown as an annual.
HARVEST:
For fresh use, cut stems when one or two blooms on the spray have opened.SOIL: Fertile ground that drains well.SCIENTIFIC NAME: Agrostemma githagoALTERNATE NAME: Corn cockle
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