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greenhouse tomatoes to deter whiteflySet up a 'watering bench' using capillary matting to look after pot plantsSow seeds of Christmas cherry (solanum) to grow as winter pot plantsHang yellow sticky traps in the greenhouse to help control whitefly Thin out

Prick out petunia seedlings once they've developed two true leavesSow French and runner beans in pots Put up greenhouse shade netting if the sun is out and conditions are hotPlant up hanging baskets and patio pots with summer beddingBuy young plants

, including African violets, begonias and Cape primroseHang yellow sticky traps over plants to catch whitefly and flying pestsSow seeds of herbs, such as parsley, chives, coriander, garlic, basil, dill, fennel, mint, thyme, sage and lovage

Water crops in growing bags and pots daily, adding a liquid feed once a weekIntroduce biological controls if you have discovered pests, such as whitefly and red spider mitePinch out developing sideshoots on tomato stemsTrain cucumbers and tomatoes

Plant bulbs, corms and tubers like achimenes, begonias, gloxinias in potsSow coleus and other houseplantsWatch out for pests, like whitefly and red spider mite, and treat at oncePut a mouse trap in your greenhouse if you find seeds and plants being

Fit automatic openers to greenhouse vents to encourage good air circulationPlant tomatoes in growing bags or large pots, training them on to canes or wires for supportBring pots of strawberries into the greenhouse to produce early flowers and fruit

Tie greenhouse tomatoes to their supports as they growFeed plants with full-strength fertiliser solution once a week, or apply a more diluted feed every few daysApply shading paint or put up shade netting or blindsOpen doors and vents daily

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

and grow bags with tepid water, if possible. Try leaving a few full cans of water in the greenhouse to warm upSend off for biological pest controls for whitefly and red spider mitePropagate lilies from bulb scales, digging bulbs from the garden to remove a

Hang up yellow sticky traps to monitor and control whitefly and other flying pestsFeed begonias and other plants in potsTreat red spider mite with a biological controlTie ripening melons to sturdy supportsPot on rooted cuttings to keep plants growing