Red Radish Seeds

Red Radish (Raphanus sativus) is the classic salad radish: a small, round root with glossy crimson-red skin wrapping crisp, snow-white flesh. The flavour is clean and refreshingly peppery with a gentle bite that mellows the moment it meets a cool, moist bed. This is a true quick-turnaround salad type - one of the fastest vegetables you can grow - prized for slicing raw into salads, scattering over open sandwiches, or serving whole with a little salt as a crunchy garnish. Its bright colour and snappy texture make it a favourite for fresh, everyday eating rather than long storage.

Planting

Radish is a cool-season crop, so timing matters more than anything. Sow salad radishes successionally through the cooler months, making repeated small sowings every 10-14 days for a continuous harvest. Avoid sowing in hot, dry weather, since heat sends the plants to flower (bolting). Sow the seed directly where it is to grow - radish dislikes root disturbance and is never transplanted - at about 1 cm deep. Space seeds 2.5-5 cm apart, with rows about 15 cm apart. Seedlings push through quickly, usually in 3-10 days (often 4-7 days in warm soil, up to 10 in cool soil). Radish will germinate in soil as cool as around 5 C, with the optimum range for growth roughly 10-24 C and the fastest germination near 21 C; sustained temperatures above about 21 C trigger bolting.

Fertilizing

Prepare the bed with aged compost before sowing, then side-dress with more aged compost at midseason to keep growth steady. Steer clear of fresh manure and high-nitrogen fertilizers - they push lush leafy tops at the expense of the roots you actually want. A balanced or low-nitrogen feed is the better choice, and this root crop responds well to a phosphorus-leaning blend such as 5-10-10.

Care

Give radishes an open, sunny site; in the warmest part of the season light or partial shade is acceptable for salad types and helps reduce bolting, and shorter day length (around 8 hours) favours root formation over flowering. Keep the soil consistently moist for rapid, even growth and crisp, non-split roots, aiming for about 2.5 cm of water per week and soaking the bed thoroughly at least once a week; sandy soils need watering more often than heavy clay. Irregular or scant watering makes roots woody and hot-tasting. Thin the seedlings about a week after they emerge - salad types to roughly 2-2.5 cm apart - so each root has room to swell. Watch for flea beetles nibbling small holes in the leaves, cabbage root fly maggots tunnelling into roots, plus slugs, snails, aphids and wireworms; a floating row cover and consistent moisture help fend off flea beetle and root fly damage. Salad radishes mature fast, in about 3-5 weeks (20-30 days), and are ready when the roots reach roughly 2.5 cm across. Harvest promptly, because over-mature roots turn woody, pithy and split.