key growing information

How to Grow Dwarf Sunflowers From Seed

How to grow dwarf sunflowers from seed: direct sowing or pots, temperatures for compact plants, spacing, soil, cutting and drying.
By Hensley’s Seed Co.

Dwarf Sunflowers - Key Growing Information

Neither children nor adults can resist the allure of a patch of sweet dwarf sunflowers.

DAYS TO GERMINATION:

Seedlings appear in about 7–14 days at 70–75°F (21–24°C).

SOWING:

Sowing in place is recommended: after the last frost, plant groups of 3–4 seeds ½" deep and thin to one plant when true leaves form. For transplants, sow straight into the final pot 3–4 weeks before planting out, 1 seed per 6" pot or 3 per gallon pot; the plants resent root disturbance. If moving them into beds, wait for 3–4 true leaves.

GROWING ON:

Keep plants at 70–80°F (21–27°C) by day and 50–60°F (10–16°C) at night. Warmth makes them stretch; cooler conditions keep them shorter.

LIGHT PREFERENCE:

Full sun.

SOIL REQUIREMENTS:

Light, well-drained soil of low to moderate fertility.

PLANT SPACING:

8–12" apart, far enough that leaves don't overlap; crowding makes plants taller with weaker stems.

HARDINESS ZONES:

Grown as an annual.

HARVEST:

For fresh use, cut as flowers are just starting to open. For drying, let them open fully, then hang or use silica gel.

USES:

Ideal for containers and massed plantings.

SCIENTIFIC NAME:

Helianthus annus

Source and attribution

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