Thin seedlings to 7.5cm (3in) apart when large enough to handle. A few weeks later harvest every alternative plant for use in the kitchen.
Keep well watered during dry periods in summer.
Winter cultivars will need protection from October onwards - unless you live in a mild area. Cover with cloches or protect the crown with straw or similar material and cover with fleece.
Birds: Birds, especially pigeons, can cause an array of problems including eating seedlings, buds, leaves, fruit and vegetables.
Remedy: Protect the plants from birds by covering them with netting or fleece. Scarecrows and bird-scaring mechanisms work for a while, but the most reliable method of protection is to cover plants with horticultural fleece or mesh.
More info on Birds
Bolting: Plants flower and set seed prematurely.
Remedy: Unless growing for seed sow bolt-resistant varieties. Sow or plant at the correct time and keep the soil or compost moist.
More info on Bolting
Spinach downy mildew: Spinach downy mildew attacks only spinach and is worst in mild, humid weather. Well grown plants in gardens are not usually badly affected except in wet weather. The felty mildew makes the leaves unappetising.
Remedy: You can help to prevent this disease by making sure there is plenty of space around plants to improve air circulation, watering the soil at the base of the plants, and by choosing mildew resistant varieties.
More info on Spinach downy mildew
Summer cultivars: pick between late May and the end of October.
Winter cultivars: pick between October and April.
Harvest the leaves continually once they're large enough to pick. To prevent the leaves tasting bitter make sure the soil is rich and contains plenty of organic matter.
Greg Wallace, judge on TV’s Masterchef, thinks everyone should try his Spinach and Roquefort tart.
‘Palco’ AGM: Slow to bolt and mildew resistant.
‘Monnopa’ AGM: Autumn or summer, slow to bolt, thick leaves.
‘Atlanta’ AGM: Hardy, for winter use.