• Pepper plants will benefit from being potted on into progressively larger pots.
• Train cucumber stems upwards instead of trailing over the ground, to make the most of the space available. Simply tie in their long stems to vertical wires or use cane supports to create a wigwam of poles.
• If you're growing aubergines, pinch out the growing tip once they have 5 or 6 fruits. Pick fruits while they are young. You can expect to start harvesting mid- to late summer.
• Nip off the growing tips of squash and courgette plants to encourage branching.
• Pinch out tomatoside shoots each week. Cut off any leaves growing below the lowest ripening fruit trusses to improve air circulation and prevent diseases.
• Boost your tomato crop by regularly feeding plants with dilute tomato fertiliser once a week. If leaves look pale and yellow feed more regularly.
• Feed crops with a general purpose fertiliser.
• Apply a high-potash fertiliser once fruits start to form on peppers, cucumber and tomatoes. You can use this on sunflowers too.
• Harvest garlic when the tops start to bend over and yellow. To find out more, read our 'how to grow garlic' guide.
• Pick your courgettes while they’re young. Regular picking encourages more fruit.
• Encourage more marrows by harvesting regularly. Marrows that form in July and August should reach a good size by autumn. Let their skins harden in the sun before cutting them later in September or October. They can be stored into winter.
• Pick, dry and freeze herbs for using later in the year.
• Pick runner beans regularly to prevent them becoming stringy and to make room for developing pods. Leaving mature pods on the plant can prevent further flowers forming and reduce your crop.
• Harvest beetroot, peas, carrots, chard, potatoes, salad leaves, lettuce and tomatoes this month.
• Resist the temptation to harvest more rhubarb stems. Leave the stems in place; this will allow the plant to build up reserves for next year.
• Water your fruit and vegetable crops daily in warm weather. Try to ensure that they’re consistently moist.
• Use grass clippings as a mulch around potato plants to stop tubers near the surface from turning green. Alternatively earth up your potato plants as they grow. If you're growing potatoes in bags, gradually add more compost until the bag is full.
• Control slugs to prevent them damaging your crops. Try using a natural pest control to reduce numbers.
• Tackle blackfly on broad beans by pinching off any affected growing tips.
• Check for cabbage white butterfly eggs under brassica leaves and squash any that you find.
• Clear away any diseased and spent foliage on and around your vegetable plants to keep them healthy.
• Clear weeds regularly, as they compete with your crops for nutrients and water.
In the fruit garden
Generously water raspberry plants in hot weather Image: Ria H
• Thin out the fruits on your fruit trees to produce good sized crops. This also helps to prevent brown rot.
• Protect any developing fruits from birds and squirrels by placing netting around your plants.
• If you have plants fruiting in containers, make sure you give them a high potash liquid feed to keep them healthy and productive.
• Feed lemons and other citrus fruit trees throughout summer with a special citrus fertiliser.
• Treat apple scab with a fungicide. Always read the manufacturer’s label to check the suitability for use on edible crops.
• Check the leaves of gooseberry bushes for sawfly larvae, which can completely strip the foliage in a matter of days. Jet them off with water or pick them off by hand.
• Peg down runners on your strawberry plants to create more plants for next year. If you don't need more plants simply remove the strawberry runners completely.
• Maximise your fig crop by pinching out the tips of side shoots after they’ve developed five leaves.
• Prune your plum, apricot, peach and cherry trees now. Pruning these species in the summer reduces the risk of silver leaf disease.
• If you've trained your apples and pears as cordons, fans or espaliers, give them their summer prune now to maintain a good shape.
• Prune the fruited stems of blackcurrant bushes after harvesting.
• Raspberries are shallow rooted so they’ll appreciate being watered generously in hot, dry weather.
In the greenhouse
Clear away fallen leaves and spent blooms to discourage disease Image: Eva Kali
• Check plants daily. Water first thing in the morning or in the evening to reduce water loss through evaporation.
• Harden off and plant out any plug plants that you’ve been growing on.
• Damp down your greenhouse on hot days to increase humidity and deter red spider mites.
• Open vents and doors daily to provide adequate ventilation.
• Use blinds or apply shade paint to prevent the greenhouse from overheating in sunny weather.
• Try hanging sticky traps to catch flying pests and determine which pest control is needed.
• Tidy up fallen leaves and flowers to discourage the spread of fungal disease.
Looking after your lawn
Don't let your lawn dry out in heat Image: topseller
• This is your last chance to feed your lawn with a special lawn fertiliser to encourage healthy green growth.
• Water your lawn during hot weather, particularly newly seeded or turfed lawns. Don’t allow new lawns to dry out.
• If you’re experiencing prolonged dry weather, set your mower blades higher to reduce stress on the grass.
• Warm weather encourages rapid weed growth - apply specific lawn weed killer to tackle this problem.
• If your lawn is infested by ants, brush out the nests on a dry day. Always brush them away before mowing.
• Recut any lawn edges if needed and install lawn edging to make future maintenance easier.
• Remove floating blanket weed from ponds by twirling it around a stick or garden cane. Before composting it, pile the weed close to the pond for a few hours so any displaced creatures can crawl back into the water.
• Keep an eye out for powdery mildew on plants. Remove any affected parts and spray with a fungicide to prevent further spread.
• Look after your aphid eaters - ladybirds, hoverflies and lacewings feast on greenfly and blackfly so it’s worth protecting them.
• Look for aphids on the underside of leaves - rub them off by hand or spray with an insecticide to prevent them multiplying. Alternatively use natural pest control such as Lacewing larvae.
• Keep an eye out for scarlet lily beetles on your lilies - remove and crush any you see. Also check for the sticky brown larvae on the underside of leaves.
• If your plants are wilting for no obvious reason, check for vine weevils by tipping your plants out of their pots and looking for 'C' shaped creamy maggots amongst the roots. Treat with nematodes if vine weevils are spotted.
• Prevent slugs attacking your young plants by using pest control. For container plants apply copper tape.