key growing information

Growing Ornamental Kale From Seed

How to grow ornamental kale for cutting: germination, cool growing temperatures, timing for fall color, close spacing, stripping lower leaves, netting and cutting stage.
By Hensley’s Seed Co.

Ornamental Kale - Key Growing Information

Ornamental kale's red, pink, purple, and white rosettes thrive in the cool season garden with minimal care.

DAYS TO GERMINATION:

Allow 10–14 days at 70–85°F (21–29°C).

SOWING:

Transplants are recommended, sown 4–6 weeks before planting out. After germination, grow seedlings cool, at 60–70°F (16–21°C), for 3–4 weeks. Color develops once temperatures fall below 50°F (10°C). To sow in place, plant about 3 months before your expected fall or winter frost. Strip the lower leaves once plants are 10–12" tall, and repeat 3 or 4 times.

LIGHT PREFERENCE:

Full sun.

PLANT HEIGHT:

Grows about 24–36" tall.

PLANT SPACING:

4–6" apart; wider spacing makes heads too big for cut flowers.

HARDINESS ZONES:

Grown as an annual.

HARVEST:

Aim for a 6" head on a 24" stem, with good color. Color starts once temperatures drop below 50°F (10°C).

SOIL REQUIREMENTS:

Moist soil with good drainage. Stop feeding once plants start to color.

USES:

A long-lasting cut flower.
SPECIAL INSTRUCTIONS: When plants reach about 10–12", strip off the lower leaves, and do this 3 or 4 times as they grow. Top-heavy plants tend to fall over, so support them with horizontal netting.

SCIENTIFIC NAME:

Brassica oleracea

Source and attribution

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