Kohlrabi Stat Summary
Plant Spacing: 3-6" (76-152 mm)
Row Spacing: 15-20" (381-508 mm)
Planting Depth: 1/4" (6 mm)
Plants Per Person: 5
Soil Temperature: 45-85°F (7-29°C)
Days to Emergence: 4-7
Recommended Soil PH: 6.0-7.5
Seed Indoors: 6 weeks before transplanting
Earliest Outdoor Planting: Around Last Frost
Can direct seed outdoors
Can seed indoors
Prefers well-drained, fertile soil high in organic matter, pH 6.0 to 7.5. This heavy feeder needs a lot of consistent moisture. Sow 1/4 inch deep and 1/2 inch apart in sterile seedling mix. Transplant outside when there are 6 to 8 leaves.
As soon as the ground can be worked in the spring, you can direct sow outdoors about 1/4 inch deep and 1 inch apart in rows 15 to 20 inches apart. Wait until early fall to plant a second crop, after the hottest afternoon temperatures have passed.
Mulch around plants can help maintain moisture and reduce weeds.
Harvesting and Storing Kohlrabi
For tender, sweet kohlrabi, harvest them when they are less than 2 inches in diameter. Larger plants become woody and bitter. You can store at 34 degree F and high humidity.
Kohlrabi Insect and Disease Information
Cabbage worms are small green larva of the cabbage white butterfly. You can use row covers to keep them from eating small plants; hand pick and destroy on older plants. Aphids can be periodically sprayed off with a stream of water. Keeping the soil pH at or above 7.2 will help suppress club-rot; if needed, adding lime will raise your soil pH.
Kohlrabi Yield Information
No yield information for Kohlrabi.
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