Radish

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Fast food – for real

Radishes grow incredibly fast. If they slow down from stress or crowding, they often become tough or overly spicy instead of crisp and mild.

Cool roots are happy roots

Radishes prefer cool weather. In heat, they bolt quickly and develop a sharp taste instead of forming nice roots.

Even water = better texture

Uneven watering leads to cracked or pithy roots. Keep the soil consistently moist for the best texture.

Give them space early

Crowded radishes never develop properly. Thin early so each plant has enough room to form a round, healthy root.

Sow little and often

Instead of sowing everything at once, sow small batches regularly. This ensures a steady supply instead of all radishes maturing at the same time.

Loose soil, straight roots

Radishes prefer loose, stone-free soil. Heavy or compact soil leads to misshapen or stunted roots.

Overview

Size (cm): 10 cm width · 25 cm height
Comfort temperature: 5-20 C
Temperature limit: -3 C
Planting temperature: 5 C
Germination time (days): 4

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General

Radish is one of the fastest-growing vegetables, often ready to harvest in just 3–5 weeks. It is a cool-season crop that performs best in spring and autumn. There are many types, from small round red radishes to long white varieties and larger winter radishes. Their crisp texture and peppery flavor make them popular fresh in salads.

Light

Full sun to partial sun.

Soil type

Light, loose, well-drained soil; sandy loam is ideal. Avoid compacted or stony soil.

Water requirement

Moderate; keep soil evenly moist but not waterlogged.

Nutrient requirement

Low to moderate; too much nitrogen leads to leafy growth and poor root formation.

Precultivation

Radishes are almost always direct sown because they grow so quickly and do not transplant well. Seeds germinate rapidly in cool soil, often within a few days. Keep soil evenly moist but not wet, and ensure good light from the start.

Planting

Sow directly outdoors in rows or scattered beds as soon as soil is workable and temperatures are above about 5°C. Sow shallowly and cover lightly with soil. Space seeds thinly or thin seedlings early to about 3–5 cm apart. Choose a sunny or lightly shaded spot with loose soil for best root development.

Pruning

No pruning is required. Remove any damaged leaves if necessary, but radishes are typically left to grow naturally until harvest.

Maintenance

Keep soil consistently moist and weed-free to reduce competition. Avoid over-fertilizing, especially with nitrogen, as this leads to more leaf growth than root development. Mulching lightly can help maintain even moisture.

Harvest

Harvest promptly when roots reach the expected size for the variety, usually within 3–5 weeks for small types. Pull gently from the soil. Delayed harvest leads to woody, hollow, or overly spicy roots.

Common issues

Bolting in warm weather leads to poor root formation. Uneven watering can cause splitting or pithy texture. Flea beetles may damage leaves, especially in dry conditions. Crowding leads to small or misshapen roots.

Rotation schedule

Rotate every 3–4 years away from other brassicas such as cabbage, broccoli, kale, and turnip to reduce pests and soil-borne diseases.

Pollination

Usually harvested before flowering; if left to flower, it is insect-pollinated and cross-pollinated.

Companion plants

Carrot, lettuce, spinach, cucumber, peas.

Incompatible plants

Hyssop and very dense neighboring plants that compete for space.

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