Plants growing in containers will be totally dependent on you to supply nutrients. For fruiting crops, you should change to one that is higher in potash - such as a tomato fertiliser - to improve the quantity and quality of the fruit. For leafy crops this should be a balanced feed containing equal amounts of all the major nutrients. Some crops will need additional light feeds throughout the growing season, and this is usually best given as a liquid feed. You can use growmore (a balanced, general-pupose fertiliser formulation) or, if you garden organically, blood, fish and bonemeal. For most crops, add a general fertiliser a week or so before seed sowing or planting out. Adding compost and even well-rotted manure to the soil will only add small amounts nutrients they are mainly used to improve soil structure.įeeding with a fertiliser will usually be necessary. To get the most from your crops you will need to provide a constant supply of nutrients. If water is in short supply then use it on the following crops: peas, beans and sweet corn when they are in flower potatoes when they are producing their new tubers large, leafy crops before they start to wilt. Some crops - such as the greenhouse crops and runner beans - and most seedlings will suffer a shock if watered with cold water, so allow it to reach ambient temperature before using. Always use fresh tapwater for this, for water stored in waterbutts may contain pathogens (such as germs and bacteria) that could affect seedling growth. Seeds and seedlings are the most critical stages for many plants, so make sure seed beds and seeds sown in containers are kept moist while plants are establishing. The aim should be to keep the soil or compost evenly moist - soaking dry soil can result in some crops splitting and becoming unusable. Plants growing in containers are almost totally dependent on you to supply water, and you may have to water some container crops once or even twice a day in summer to prevent them drying out. As a result, watering in summer is often necessary. When a plant goes short of water it stops growing and often starts to go to seed prematurely (bolting) - or just dies.įor healthy, strong growth and the highest yields of the best crops your plants will need a constant supply of water at the roots. Plenty of water is vital for healthy growth and cropping. RHS Hampton Court Palace Garden Festival - 2–7 July 2024.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.
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