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key growing information
How to Grow Geraniums From Seed
How to grow geraniums (Pelargonium) from seed: transplant timing by cell size, covering seed, growing temperatures, deadheading, spacing and uses.
By Hensley’s Seed Co.
Geranium - Key Growing Information
DAYS TO GERMINATION:
Seedlings appear in about 7–10 days at 70–75°F (21–24°C).
SOWING:
Transplants are recommended. Sow 7–9 weeks before planting out for 128- to 288-cell plugs, or 9–11 weeks ahead for bigger cells or pots. Cover seed with 1/8" of mix (light isn't needed) and keep the surface moist. After germination, grow at an average of 60–75°F (16–24°C). Harden off and plant out after frost danger has passed. Removing spent flowers keeps plants healthy and blooming all season. Direct sowing isn't recommended.
LIGHT PREFERENCE:
Full sun; tolerates part shade, though with fewer flowers.
PLANT HEIGHT:
Grows about 12–16" tall.
PLANT SPACING:
12–14" apart in beds; in containers, use 3–5 plants per 10–12" pot.
HARDINESS ZONES:
Grown as an annual.
SOIL REQUIREMENTS:
Ordinary soil with good drainage.
USES:
Garden beds, containers, window boxes, hanging baskets and landscape plantings.
SCIENTIFIC NAME:
Pelargonium X hortorum
ALTERNATE NAMES:
Cranesbill
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