When to plant or sow Radish?

Radishes thrive in full sun or partial shade and prefer well-drained sandy or loam soil. They are one of the fastest-growing vegetables, making them ideal for succession sowing throughout the growing season. You can sow radish seeds directly outdoors from March through to August, though early sowings in March and April may benefit from cloche protection if the weather is still cold. Prepare the soil by raking it to a fine tilth and removing any stones or large clumps. Radishes prefer a soil pH of around 6.0–7.0 and do not need heavily enriched ground; in fact, too much nitrogen encourages leafy growth at the expense of the root. If your soil is heavy clay, work in some sharp sand or compost to improve drainage. Sow seeds thinly in shallow drills about 1 cm deep, spacing rows roughly 15 cm apart. Aim for a seed every 2–3 cm if possible; this reduces the need for thinning later. Cover lightly with soil and water gently. Germination usually occurs within five to seven days in warm soil. Once seedlings emerge, thin them to a final spacing of about 5 cm apart. Crowded radishes will not develop proper roots. Water immediately after thinning to settle the soil around the remaining plants. For a continuous harvest, sow a short row every two weeks rather than a large batch all at once. Radishes mature quickly—often within three to four weeks in summer—so regular small sowings ensure you always have tender roots ready to pick without a glut.