Scarlet Kale leaves arranged in a circular pattern on a white background
Scarlet Kale in a tall red vase on a white background.
Close-up of Scarlet Kale growing in the garden.
Scarlet Kale leaves surround a bowl of kale salad on a purple background.
Scarlet Kale leaves arranged in a circular pattern on a white background
Scarlet Kale in a tall red vase on a white background.
Close-up of Scarlet Kale growing in the garden.
Scarlet Kale leaves surround a bowl of kale salad on a purple background.

Kale Seeds,
Scarlet

4.634 ReviewsSKU: #KA116Min. seed count: 250
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Description

(Brassica oleracea var. sabellica). A lovely curled "red" kale that produces lots of delicious, frilly leaves and takes the chill of winter in stride! Pretty in the flower garden or on the plate. Rich in nutrition and flavor. In our preliminary tests, it had almost as much vitamin C as oranges, the most of any kale we tested in 2020. A true superfood that is so pretty!

Growing Tips: Scarlet kale grows best in cooler weather, which can even enhance its color and flavor. This variety is frost hardy, making it an excellent choice for fall and early spring planting. It grows best in full sun but can tolerate partial shade, especially in warmer climates to prevent bolting. Plant in rich soil.

Plant Details

Botanical Name
Brassica oleracea var. sabellica
Life Cycle
Biennial
Sun Requirement
6–12 hr.
Days to Germinate
6–9
Days to Maturity
65–80
Planting Depth
¼ in.
Plant Spacing
8 in.
Ideal Temperature
45–85°F
Frost Hardy
Yes

When to Grow

Scarlet kale can be planted in early spring or late summer. For spring crops, start seeds indoors or sow directly 2-4 weeks before the last frost date. For a fall harvest, direct sow seeds outdoors 8 weeks before the first expected frost. The plant grows best in temperatures between 45 F and 85 F, with optimal color and taste developing in cooler weather. 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 Scarlet Kale seeds about 1/4 inch deep, spacing them 8 inches apart. This kale variety can also be grown in containers; use a pot at least 12 inches deep and wide to accommodate root growth. Ensure the soil is well-draining and enriched with organic matter like compost​.

How to Grow

Water Scarlet kale regularly, aiming for 1 to 1.5 inches of water per week to keep the soil evenly moist but not waterlogged. Mulching around the plants can help retain moisture and suppress weeds. Use a balanced fertilizer or compost to provide necessary nutrients, especially during the growing season. Regularly harvesting the outer leaves will encourage continuous 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

How tall does Scarlet kale grow?

It can grow up to 2-3 feet tall at full size. Plants grown for tender leaves are spaced 8 inches apart and will spread wider if given more room. This height makes it an excellent choice not only for garden beds but also for adding it to ornamental garden designs.

Can Scarlet kale be grown in warmer climates?

While it prefers cooler temperatures for optimal color and taste, it can still be grown in warmer climates with some care. In hotter regions, plant Scarlet kale in a spot that receives morning sun and afternoon shade to prevent it from bolting and to protect it from heat stress. Consistent watering and mulching can also help keep the soil cool and moist.

Can Scarlet Kale be grown in containers?

Yes, it can. Use a pot that is at least 12 inches deep and wide to provide sufficient space for the roots.

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