Flowering Kale

Transform your cool-season garden with the stunning colors of flowering kale. This plant brings bold shades of white and purple to the garden’s quiet seasons of fall and early winter. In milder zones, plants can look good all winter long. This is an ornamental plant; although the leaves can be eaten, they’re really only good for garnish or as a base for such dishes as egg salad or hors d’oeuvres.

Once night temperatures stay at or below 50 degrees, count on flowering kale to brighten your vegetable garden, flower bed, or container after about two to four weeks. Space plants 12 to 15 inches apart. Use tighter spacing in colder regions, because plants won’€™t grow as quickly. Use one plant per 8-inch pot; add more plants as needed to fill out larger pots.

  • Matures 75 to 90 days
  • Plant spacing 12 to 15 inches apart
  • Plant size 12 to 18 inches tall

Some Bonnie Plants varieties may not be available in your local area, due to different variables in certain regions. Also, if any variety is a limited, regional variety it will be noted on the pertinent variety page.

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At a glance
Nutrition Information

Light requirements: Full sun is ideal, but plants yield in part shade. Protect plants from strong afternoon sun in warmest regions.

Planting: Space 12 to 24 inches apart, depending on type. (Read the stick tag that comes with the plant for specific spacing recommendations.)

Soil requirements: These greens need moist, nutrient-rich soil. Amend soil with 4 to 6 inches of compost or other organic matter prior to planting. Soil pH should be 6.5 to 6.8.

Water requirements: Keep soil consistently moist throughout the growing season. Aim for 1 to 1.5 inches of water per week through rainfall or irrigation. Mulch soil to reduce water evaporation and keep leaves clean from splashing soil.

Frost-fighting plan: Established plants tolerate hard frosts (temperatures below 28º F) and produce new leaves all winter long in zones 7 to 10. Frost-kissed leaves boast sweeter flavor. Protect newly planted seedlings from late spring or early fall frosts by covering plants with a frost blanket.

Common issues: Watch out for cabbageworms, harlequin bugs, slugs, grasshoppers, and cabbage aphids. Kale is a cole crop, so clubroot can attack plants. Kale can be slow to take off in the garden. Spring plantings may linger until soil warms; fall crops can stall a bit with warm air.

Harvesting: Harvest leaves when they are up to 10 inches long. Younger, shorter leaves have the mildest flavor. Pick lower leaves first, and the plant will continue to produce new upper leaves.

Storage: Refrigerate unwashed leaves in a lightly damp paper towel slipped into a very loosely closed plastic bag and store up to 5 days.

For more information, visit the Kale page in our How to Grow section.

Nutrition Facts

1 cup cooked, chopped kale:
  • Calories: 36
  • Carbohydrates: 7g
  • Dietary fiber: 3g
  • Protein: 2g
  • Vitamin A: 354% DV
  • Vitamin C: 89%
  • Vitamin K: 1,328%
  • Vitamin B6: 9%
  • Manganese: 27%
  • Copper: 10%
  • Calcium: 9%
  • Potassium: 8%

Nutritional Information

Kale is a member of the cabbage family, and its leafy greens are at their best eaten young, before the fibers become tough. Like all fresh greens, kale is a powerhouse of vitamins and minerals, especially vitamins A, C, and K. One cup of cooked kale will give you over 1,000 percent of your daily value of vitamin K, a nutrient established to be important in bone formation. Manganese, which promotes bone density, is also high in kale. And like other cruciferous vegetables, kale is high in sulfur-containing phytonutrients that have been found to prevent cancer.