Quick Reference

Type of Harvest: Single harvest

Transplant/Direct Sow: Direct sow or transplant

When to Plant: Direct sow when soil temps are over 40°F. For successive gardening, start seeds indoors 8 weeks before the average last frost date. Direct so Kohlrabi seeds 6-8 weeks before the average first frost date for a fall garden.

Days to Germinate:3-10 days

Days to Maturity: 55 days - most varieties

Planting Depth: 1/4 ” deep

Germination Temp: 40°F

Seed Spacing:Plant 1” apart. Thin to 9-12” apart.

Row Spacing:1.5' apart

Light:Full sun 6-10 hours per day

Soil pH:6.0-7.5 pH

Water:1- 1 ½” of water per week

Soil Temperature:Minimum 40°F. These are cool weather loving plants.

Fertilizer:5-5-5 N-P-K ratio

Rotation:Not needed for Kohlrabi, but good practice. Rotating Kohlrabi helps prevent soil-born plant diseases and is good for the bed.


Harvest Type
Kohlrabi is generally a single harvest plant if you are harvesting just the stem bulb. However, you can eat the leaves too and Kohlrabi makes a good cut green.

Transplant / Direct Sow
Direct Sow In the spring when the ground can be worked and soil temps are over 40°F. For successive gardening, start seeds indoors about 6-8 weeks before the average last frost date. Because Kohlrabi is a cool weather plant, you can direct sow seeds in late summer, about 8-10 weeks before the average first frost date. Kohlrabi plants and seedlings will tolerate some frost, but a row cover is helpful. Transplant seedlings when they are 3-4 inches tall and when the soil temperature is above 40°F.

Full Sun - 6-10 hours of full sun per day.

When to Plant:
Transplant or direct sow seeds when the soil temperature is 40°F.

Days to germinate
It takes most Kohlrabi cultivars 3-10 days to sprout.

Days to maturity
It takes about 55 days for Kohlrabi to reach full maturity.

Planting Depth
Plant seeds 1/4" deep.

Germination Temperature Range
Germination is best when the soil is 40°F.

Spacing Between Plants
Plant seeds 1-2" apart and thin to 9-12". Kohlrabi is a somewhat narrow plant with a narrow root zone.

TIP: Don't be afraid to over-plant brassica plants if you have the extra room. Your livestock will love them.

Companion Plants
Mustard, kale, broccoli, peas, chard, onions, pole beans, and dill all make excellent companion plants for Kohlrabi

Growing conditions
Kohlrabi likes the cold weather. Start with good, well-draining soil—water with 1-1.5" of water per week, keeping the ground evenly moist. Plant in full sun. Kohlrabi will bolt if the weather becomes hot. Direct sow seeds or start indoors for spring plantings.

Tip: Kohlrabi is a favorite for aphids. You can minimize pest issues for by installing a row cover.

Kohlrabi is a crop that you do not need to rotate, but rotating Kohlrabi helps to prevent certain soil-borne plant diseases.

Anticipated yields
Plan your garden yield at 4-6 Kohlrabi plants per person. Expect 4-10 pounds of Kohlrabi per 10 feet of row space. If you over-plant, you can share them with others or give the extra fruit to chickens and livestock as a treat

Ultimate Survival Food Seeds 55; Herb and Vegetable Seed Collection