key growing information

Growing Marigolds From Seed

How to grow marigolds from seed: quick germination, transplants or direct sowing, pinching, heat stalls, deadheading, height by type, soil and uses.
By Hensley’s Seed Co.

Marigolds - Key Growing Information

A bouquet of marigolds, workhorse of the cut-flower garden, also prized for their allelopathic qualities.

DAYS TO GERMINATION:

Seedlings appear in 4–7 days at 75–80°F (24–27°C).

SOWING:

Transplants are recommended: sow into a 72-cell flat or your usual container 4–6 weeks before planting out, just covering the seed, and plant out once frost is past. For blooming packs, sow 8 weeks before you want flowers. To sow in place, plant ¼" deep. Pinch plants to make them branch.
NOTES: Hot spells can make plants stall, slowing growth and flowering for a while. Remove spent blooms often for more flowers.

LIGHT PREFERENCE:

Full sun.

PLANT HEIGHT:

Varies.

PLANT SPACING:

8–18" overall: French types 8–12", Gem types about 12", African types 12–18".

HARDINESS ZONES:

Grown as an annual.

HARVEST:

Cut when flowers are fully open but the centers are still tight.

SOIL REQUIREMENTS:

Average soil with moderate feeding; pH 6.0–7.5 is best.

USES:

Beds, borders, mass plantings, containers and window boxes. The flowers are edible, and taller varieties make good cut flowers.
SCIENTIFIC NAME: Tagetes spp.

Source and attribution

Migrated library resource. Original named people, organizations, research, and factual provenance are retained.