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Wash greenhouse glazing to let in maximum lightBring potted cordylines under cover for winterInsulate your greenhouse with bubble polytheneMaintain plant hygiene, picking off faded blooms and dead leaves from all plantsWater plants more sparingly

Clear out old tomato and cucumber cordons and add to the compost heapMove potted bulbs into the greenhouse to develop before bringing into the houseWater sparingly, aiming to keep the atmosphere as dry as possible over winterBring potted herbs under

Keep potted herbs on the staging to crop over winterMove potted bulbs into the greenhouse to develop before bringing into the houseClear out old crops and growing bagsWater sparingly and aim to keep the atmosphere as dry as possible over winter

Plant dahlia tubers in pots or trays, and place in a heated propagatorStart raising crops from seed, including tomatoes, chilli peppers, aubergines and cucumbersPrevent seedlings being affected by damping-off disease by watering compost with a

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

Check greenhouse heaters are working efficiently Bring aeoniums and other tender plants under cover before they get frostedClear out exhausted crops and wash down glazing, staging and frameworkFinish planting paperwhite narcissi and prepared

Scrub off shading paint and wash the glass thoroughly inside and out Listen out for weather forecasts of early frosts and be ready to bring tender potted plants under coverVentilate the greenhouse on warm days, but close doors and vents every

Pinch out tomato sideshoots developing from the main stemFit automatic vent openers to help control air flow and fit extra low-level louvre vents if requiredTie in tomato shoots to their supports. Water daily to prevent the compost drying out, which

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