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

Plant summer bulbs, such as liatris, begonia, gloxinia, gloriosa, canna, eucomis and agapanthus Maintain frost-free conditions by installing a thermostatically controlled electric fan heaterBring pots of spring bulbs into the greenhouse to encourage

Top up fuel tank of paraffin heater every eveningBring potted hyacinths and bulbs under cover to bloomMake a sowing plan for raising greenhouse crops and bedding plants, and order seeds Bring potted peaches under cover to prevent an attack of leaf

Plant winter salads in guttering or growing bagsCheck heaters are working efficientlyClean staging and wash capillary matting to use next summerLine greenhouses with bubble polythene for insulationBring pots of tender bulbs, like agapanthus

Plant hippeastrum bulbs for spring displaysInsulate your greenhouse with bubble polythene for insulationVentilate greenhouses on warm, dry daysUse rainwater to keep the compost of potted azaleas constantly moistCheck fuel levels in paraffin and gas

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

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

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

can cause split fruits and blossom end rotThin out bunches of grapes with pointed scissorsPinch out shoot tips on coleus to encourage plants to branch, and remove any flowers that formPropagate pelargoniums from cuttings during July and August to grow