Why the Sputnik-shaped kohlrabi is the ultimate fast-growing vegetable for your garden plot
In short: Often resembling a miniature space satellite, kohlrabi is a versatile, fast-growing brassica that thrives in both spring and autumn. Whether you prefer it raw in a crisp coleslaw or lightly roasted, this underrated vegetable is surprisingly simple to cultivate, even for those practicing no-dig gardening methods in cooler climates.
Kohlrabi is a unique brassica that forms a swollen stem base, commonly referred to as a bulb, which can be green, white, or purple. Despite its unusual appearance, it is closely related to broccoli and turnips, offering a sweet, mild flavor. Because it matures rapidly—often reaching harvest size in just twelve weeks, or even six weeks for baby vegetables—it is an ideal crop for filling gaps in a vegetable plot throughout the growing season.
Cultivation is straightforward, though timing is essential to prevent bolting, where the plant flowers prematurely and fails to develop its bulb. Early spring sowings are best started indoors in modular trays to avoid root disturbance, while outdoor sowing can occur from March through August. In no-dig systems, gardeners simply apply compost to the soil surface once a year without the need for additional fertilizers or slug pellets. The plants are remarkably hardy, capable of surviving temperatures as low as -8C (18F) in zone 8b.
For late-summer sowings intended for autumn or winter harvest, purple varieties are generally preferred due to their increased hardiness and slower maturation. When sowing outdoors, seeds should be placed 1.5cm deep in fertile, moisture-retentive soil. Once seedlings reach 2.5cm in height, they should be thinned to a final spacing of 15cm. Whether you are a fan of the quick-maturing 'Korist' or the attractive purple 'Kolibri', kohlrabi remains a reliable, space-efficient choice for gardeners looking to extend their harvest across multiple seasons.
Opens the Intellect+ feed with this card first. Swipe up for the next one.
Sources
- Summary by Intellect · source: Ways to grow and harvest kohlrabi and wild rocket
- Also: How to grow Kohl rabi | RHS Guide
To cite this card, link to https://intellectplus.co.uk/app/gardening-ways-to-grow-and-harvest-kohlrabi-and-wild-rocket.
How we source, check and correct cards: Editorial standards.
General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.
Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?
Related
More in Vegetables · More in Gardening · Latest · A–Z · All topics
