Propagation
Sow fresh seeds during spring in cool regions and in warmer regions sow during autumn in situ in a prepared bed and keep moist. 

Germination occurs within a few days and for a constant supply of roots seeds should be sow every 2-3 weeks during the growing period. Some varieties mature within three weeks and plant should be spaced 150 mm (6 in) apart.

Botanic information
Leaf: The dark to bright green variable fleshy leaves are obovate to oblong or oblanceolate with lobed, pinnatifid or dentate margins. The petioles are green and the leaves are arranged in a basal rosette. Immature leaves are eaten as a vegetable and are used in salads.

Flower: The purplish-pink to white rotate flowers are up to 15 mm (⅔ in) wide and have 4-obovate petals that have darker veins. The sepals are purplish and the slender pedestal is up to 12 mm (½ in) long and the flowers are arranged in a raceme that is held above the foliage on slender purplish scape to a 1 m (3 ft) tall. They appear from early to mid-summer and pollinated by bees.

Note:
The flowers can be chopped and eaten in salads adding a spicy flavour.

Fruit: The small 3-valved loculicidal capsules (siliques) commonly referred to as pods and remain on the plant until mature. The small brown elliptical seeds are up to 5 mm (¼ in) long and may be eaten raw or used in salads. The viable seeds germinate quickly and radish is commonly grown in children's garden beds due to its ease of germination and rapid growth.

Note:
The Rat-tailed radish will not produce quality roots and is grown for its edible young seed pods that are collected during summer.

Culture
Radish dislikes heavy clay acidic soils and hot or dry periods where it will turn to seed or produce hollow tubers. It is important to keep the soil moist for optimum growth of the root.
Radish a good companion plant for lettuce, peas, tomatoes, marrows and courgettes, avoid planting around grape vines. They also protect other plants from pests such as cucumber beetle and various bugs but care should be taken as they self sow readily and can become weed.