![]() Salad leaves: sow from February aiming for 5cm (2in) between plants.Potatoes: plant early cultivars from March with one tuber for every 30cm of pot diameter.Peas: sow ‘mange-tout’ cultivars with edible pods from March plant them out at 15cm (6in) spacings harvest in June and follow with salad leaves for late summer.Follow the lettuces with leeks for winter harvesting Lettuces: mini lettuces such as ‘Little Gem’ and ‘Tom Thumb’, spaced at 15cm (6in), can be sown from January for June harvesting.Repeat crops can be sown for late summer harvest Herbs: parsley, for example, can be sown in March for harvesting from June coriander is also an attractive and popular crop.After the carrots, sow French beans to gather in September Cover the containers with fleece from April onwards to exclude carrot fly. Thin seedlings to 8cm (3in) between plants. Carrots: sow Nantes or Amsterdam cultivars from February for June harvesting.The broad beans can be followed in June or July with beetroot for late summer crops The tops can be pinched out to reduce blackfly attacks and also for use as ‘greens’. Broad beans: sow from February at 20cm (8in) spacings.Follow these with quick growing crops of late summer salads The young leaves can be used as ‘spinach’. Beetroot: sow in March at 10cm (4in) spacings.Rewarding vegetable crops for containers include: If frost is likely, cover the plants with horticultural fleece and move the pots to a warm, sheltered spot. A feed of general-purpose liquid fertiliser can be applied every two weeks. Organic growers who wish to avoid fertiliser use can get good results from mixing well-rotted manure into the potting compost in the lower half of their containers – 20 percent by volume should be sufficientĪftercare should involve provision of a constant water supply, but take care to avoid prolonged waterlogging.Home made mixtures of two parts soil and one part well rotted organic matter fortified with extra fertiliser can be an economical substitute, but home-made mixtures are not sterile, so may pose a risk for pest and disease problems.Compost in grow-bags is often both good value and reasonable quality.The soil-based compost John Innes No 3 is especially easy to manage, but other composts, including peat-free varieties, are also suitable.Use sterile proprietary potting composts to obtain best results.Aim for containers with a depth and width of at least 45cm (18in), otherwise frequent watering and feeding will be needed Smaller containers can result in a lack of moisture and nutrients for plant roots.Container-grown vegetables can be started off in a glasshouse, conservatory or porch for earlier crops. ![]() Pots, troughs and grow-bags can all be used to allow gardeners without time or room for a vegetable plot to grow fresh, tasty produce.How to grow vegetables in containers Container choice Malvern Autumn Show - 22–24 September 2023.RHS Garden Wisley Flower Show - 5–10 September 2023.RHS Garden Rosemoor Flower Show - 18–20 August 2023.RHS Garden Hyde Hall Flower Show - 2–6 August 2023.RHS Flower Show Tatton Park - 19–23 July 2023.RHS Hampton Court Palace Garden Festival - 4–9 July 2023.
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