When the seedlings are large enough to handle thin out to 23-30cm (9-12in) apart. Keep the soil moist and the plants growing well to prevent premature running to seed (bolting).
Plants need some shade in hot weather to prevent the leaves from becoming tough and unpalatable.
Keep crops weed free and the soil moist. Do not over water as this dilutes the taste.
Flea beetle: Leaves are covered in small holes and damaged areas turn brown. Seedlings are particularly susceptible.
Remedy: Grow plants under horticultural fleece and keep the soil moist. Water in nitrogen-rich fertilser to help the crop outgrow the pest.
More info on Flea beetle
Bolting: Plants flower and set seed, rather than producing edible roots. This is usually caused by stress – a cold spell or drought.
Remedy: Sow bolt-resistant varieties and keep the soil moist.
More info on Bolting
Harvest from four weeks after sowing - regular picking keeps growth young, tender and tasty.
Treat plants as ‘cut-and-come-again’ crop or pick a few leaves from plants over the whole row. Picking lots of leaves from one or two plants, weakens the growth.
As flower buds appear, pinch them out to prolong cropping, unless you want the plants to set seed – they can be used as a garnish for salads, too.
An unusual combination that makes a delicious dish such as this roasted squash, sheep’s cheese and hazelnut salad, will keep the vegetarians in your life happy.
‘Sky Rocket’: Combines the flavour of wild rocket with salad rocket's speed of growth
‘Runway’: Fast growing
‘Apollo’: A tasty, fast growing form