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Quick Facts
- Sowing window
- Sow in modules from March to April or directly outdoors from April to July, making small repeat sowings for a steady crop.
- Harvest window
- Lift the swollen stems after about 8–10 weeks, while they are between golf-ball and tennis-ball size.
- Difficulty
- Moderate
- Container suitability
- Use a pot at least 20cm deep and space plants 15–20cm apart. Keep moisture steady and harvest before the swollen stem exceeds tennis-ball size.
- Frost sensitivity
- Hardy once established
- Typical time to harvest
- Harvest in about 8–10 weeks while the stem is still tender.
SOW
When to Sow Kohl Rabi Delicacy Purple in the UK
Sow in modules from March to April or directly outdoors from April to July, making small repeat sowings for a steady crop.
Use that window as a practical starting point rather than a fixed deadline. In colder or exposed areas, delay outdoor sowing and planting; in mild sheltered areas, the earlier end of the range may work. Tender crops should remain protected until frost risk has passed.
Sowing Indoors
Sow in modules or a protected seedbed and give seedlings strong light. Potting on promptly avoids the check to growth that can spoil cauliflower and other brassicas.
Sowing Outdoors
Sow Kohl Rabi Delicacy Purple in a prepared seedbed or plant module-grown seedlings into firm soil. Protect young plants with fine mesh from the day they go outside.
PLANT
Spacing and Planting Out
Space 15–20cm apart for tender bulbs.
Before planting outside, harden off indoor-raised plants over 7–10 days unless the crop is fully hardy and already accustomed to outdoor conditions. Water the planting hole or container first and avoid leaving young roots exposed to sun or wind.
SMALL SPACES
Growing Kohl Rabi Delicacy Purple in Pots and Containers
Use a pot at least 20cm deep and space plants 15–20cm apart. Keep moisture steady and harvest before the swollen stem exceeds tennis-ball size.
Container checklist
- Use drainage holes and raise pots slightly so surplus water can escape.
- Fill with fresh peat-free compost suited to edible crops.
- Leave a watering lip below the rim and check pots more often in sun or wind.
- Use a strong support at planting time if the mature crop will climb or become top-heavy.
CARE
Watering and Feeding
Water deeply during dry spells and never allow young plants to stall. A balanced feed at planting and an occasional high-nitrogen feed during leafy growth can help container plants, but avoid overfeeding near harvest.
Variety note: Space plants well, keep them evenly watered and harvest promptly; oversized bulbs become woody. A container at least 20cm deep works well.
WATCH FOR
Common Problems
Cabbage white caterpillars
Use fine mesh supported above the leaves and check undersides for eggs. Repair gaps immediately.
Pigeons
Birds can strip winter brassicas quickly. Secure netting so birds cannot become trapped.
Clubroot
Stunted, wilting plants with swollen roots may indicate clubroot. Use clean compost in containers and rotate brassicas in beds.
PICK
Harvesting Kohl Rabi Delicacy Purple
Lift the swollen stems after about 8–10 weeks, while they are between golf-ball and tennis-ball size.
Harvest in about 8–10 weeks while the stem is still tender. Harvest in the coolest part of the day where practical and handle produce gently. Regular picking encourages continued cropping in fruiting and cut-and-come-again plants.
GROW TOGETHER
Companion Plants
Lettuce or radish can be grown temporarily between young brassicas and harvested before the canopy closes. Strong-smelling companions do not replace mesh against caterpillars.
QUESTIONS
Frequently Asked Questions
Can I grow Kohl Rabi Delicacy Purple in pots?
Use a pot at least 20cm deep and space plants 15–20cm apart. Keep moisture steady and harvest before the swollen stem exceeds tennis-ball size.
How long does Kohl Rabi Delicacy Purple take to harvest?
Harvest in about 8–10 weeks while the stem is still tender.
Why is my Kohl Rabi Delicacy Purple not forming a crop?
Interrupted growth from dry soil, root restriction, loose planting, heat or late sowing is often responsible. Keep plants firm, evenly moist and moving steadily.