Single russian red kale leaf on a white background
Frosted Russian Red or Ragged Jack Kale held by a gardener.
Russian Red or Ragged Jack Kale growing in the garden.
Russian Red or Ragged Jack Kale leaves next to a bowl of chopped kale leaves.
Single russian red kale leaf on a white background
Frosted Russian Red or Ragged Jack Kale held by a gardener.
Russian Red or Ragged Jack Kale growing in the garden.
Russian Red or Ragged Jack Kale leaves next to a bowl of chopped kale leaves.

Kale Seeds,
Russian Red or Ragged Jack

4.779 ReviewsSKU: #KA103Min. seed count: 250
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Description

(Brassica oleracea var. sabellica). 50 days. A highly nutritious kale variety with eye-catching color and form. Russian Red is very tender and mild at any size, but especially well suited to use as baby greens. The oak-type leaves of this pre-1885 heirloom variety have a red tinge, and the stems are purplish-red, adding color to the garden and the dinner plate!

Growing Tips: Russian Red kale grows best in full sun but can tolerate partial shade. Make sure that the plant receives at least 6 hours of sunlight daily. It prefers well-drained, fertile soil enriched with organic matter. Adding compost before planting can enhance soil fertility.

Plant Details

Botanical Name
Brassica napus var. pabularia
Life Cycle
Biennial
Sun Requirement
6–12 hr.
Days to Germinate
6–9
Days to Maturity
50
Planting Depth
¼ in.
Plant Spacing
8 in.
Ideal Temperature
45–85°F
Frost Hardy
Yes

When to Grow

Sow seeds in early spring 2-4 weeks before the last frost or in late summer about 8 weeks before the first frost for a fall harvest. Check local frost dates to determine the best time for planting. Russian Red kale can also tolerate frost, which enhances its flavor​. If you’re not sure how to find your first and last frost dates, consult our blog post 'Our Experts Answer Questions, Share Resources.'

How to Sow and Plant

Sow seeds directly in the garden at a depth of 1/4 inch, spacing them about 8 inches apart in rows 18-24 inches apart. If starting indoors, sow seeds 4-6 weeks before the last frost and transplant them when they are 3-4 inches tall​.

How to Grow

Water regularly to keep the soil moist but not waterlogged. Use mulch to conserve moisture and prevent weed growth. Fertilize with a balanced, organic fertilizer or compost every 4-6 weeks during the growing season. Regularly harvest the outer leaves to encourage new growth​.

How to Save Seeds

  • Like all cabbage family members, kale is biennial.
  • Kale is insect pollinated and will cross with some closely related cabbage family members, so it is wise to isolate varieties at least a mile apart to ensure pure seed. Other techniques such as alternate day caging can be used if isolation is not possible.
  • You will need to overwinter plants to harvest seeds. Mulch plants heavily with straw or cover with row cover and greenhouse plastic in an attempt to nurse plants through the winter. You can also dig up plants and store them inside to replant in spring.
  • When the flower spikes emerge in the second year, let the seed pods dry to brown and cut off the entire flower spike.
  • Hang flower stalks upside down indoors over a tarp, allowing the seeds to drop onto the tarp.
  • Seeds will remain viable for up to 4 years.

FAQ

Is Russian Red kale frost-tolerant?

Yes, it is highly frost-tolerant, and its flavor can even improve after exposure to frost.

Can Russian Red kale be grown in containers?

Yes, it can. Choose a pot that is at least 12 inches deep and wide, with good drainage.

How often should Russian Red kale be watered?

Keep the soil consistently moist. Water deeply once or twice a week, depending on weather conditions, ensuring the top inch of soil remains moist.

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