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Hand pollinate the flowers of peaches and nectarine, with a soft brushCut off hippeastrum flower heads, leaving the stalkSow summer-bedding plants in trays in a heated propagator or in the greenhousePlant dahlia tubers in trays to encourage shoots

, such as calendula, for some early flowersTidy up the greenhouse, getting rid of any old compost or rubbish that could hide unwanted visitors

of biological control nematodesDamp down the floor on hot days to increase humidityHarvest cucumbers regularly to promote further flower developmentPot up rooted cuttings into individual potsPlant pots of freesias and lachenaliaStop watering begonias

Damp down the floor every morning and open ventsWater tomatoes regularly to prevent fruits splittingSow Primula malacoides and P. obconica for flowering pot plants next springHang yellow sticky traps in the greenhouse to help control whitefly

Take cuttings of zonal and regal pelargoniums, and pot up rooted cuttings taken earlierTrain the main stem of cucumber plants up a wire to the roof of your greenhouse. Pinch out sideshoots two leaves after a flower or fruitWater plants in pots

Train cucumbers and prune back sideshootsPick off flowers on coleus to maintain their colourful leavesWater tomatoes regularly to prevent fruits from splittingTake cuttings from fuchsias, coleus, pelargoniums, marguerites and other tender perennials

to use in winter. Cut down the leaves to stimulate new growthOrder garlic ready for planting in autumnWater pot cyclamen saved from last year to start them back into growthBuy prepared hyacinth bulbs and plant as soon as possible so you get flowers

to reduce the spread of diseaseCheck dahlia tubers and bulbs in store for signs of rotPick off fading or diseased leaves from pelargoniums and other plantsContinue ventilating the greenhouse on warm daysCut down chrysanthemums after floweringPrune dormant

Clear leaves from greenhouse guttersCheck heaters daily to ensure they are working efficiently and that fuel levels don't need topping upPick off dead flowers and leavesWater overwintering plants such as pelargoniums sparinglyWash glazing inside

Plant canna lilies in pots, and leave in a warm positionSow strawberry seeds, including alpine varietiesVisit garden centres to buy young bedding plants that can be grown on to a larger size under glassCut off dead hippeastrum flowers, but allow