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plants in our video from the Gardeners' World garden at Berryfields.courgettes, outdoor cucumbers, marrows, pumpkins, squashesearly summer Common problems affecting vegetable plantsPotato blightPea and bean weevilsCarrot root fly

StringMeasuring board (optional)February - May30 minutesFebruary - MarchUsing string as a guide and a trowel or draw hoe, dig a shallow trench about 15mm deep.Sow seeds individually along the row or in groups of two or three at regular intervals, about 10cm apart. You

large clods. If necessary, incorporate some well-rotted manure or garden compost to improve soil texture and fertility.Transplant the leeks into the ground when they're about 15-20cm tall. Use a broom handle to make holes 15-20cm deep and about 15cm

Discover how Chris Beardshaw ripens tomatoes on the vine after lifting the whole plant, in our step-by-step video guide, with advice on how and where to store the plant. autumnMore advice on growing tomatoesVideo advice on growing tomatoes outdoorsJoe Swift's video guide to grow...

of tomato.Choose open-pollinated tomato varieties (not F1 varieties as they may not come 'true'). It's also a good idea to save heritage, or rare varieties of tomato in this way, to preserve the seed for future generations.TomatoesKnifeGlass jar

growing vegetablesMagnesium deficiencyLeatherjacketsCabbage white caterpillarsCourgette rot

and the soil around it with a fungicide suitable for the control of rust fungus.roses, fruit trees, ornamental trees, shrubs, perennials, vegetables spring, summer, autumnOther problems affecting garden plantsHollyhock rustRose rustBlack spotIris leaf spot

to other plants. Carry out repeated, preventative spraying the moment the first batch of tomatoes starts to set. Use fungicide containing copper. They don't provide 100 per cent protection, but an attack will be slowed down and you should get ripe tomatoes

The fungus that causes this problem spreads rapidly in the warm, humid conditions of a greenhouse. It usually becomes apparent on the lowest tomato leaves from early or midsummer, which develop yellow blotches on the upper leaf surface. The leaves eventually turn brown and wither...

Tomatoes will thrive in a greenhouse in midsummer with the right light, warmth, water and feed. But there's no point in ruining your hard work by watching the plant collapse under its own weight, when some simple staking will save the day. Nor do you want too many leaves when it'...