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Plant tomatoes in large pots or growing bagsOpen all vents on warm days, or install automatic vent openers, to encourage good air flowSow tender primulas, such as Primula obconica, P. kewensis and P. sinensis, to grow on as houseplantsTake cuttings

Empty your greenhouse and thoroughly clean inside, pressure washing the frame, staging and glazingCut back overwintered fuchsias, and increase frequency of watering to encourage new growthSow summer bedding plantsMonitor temperatures with a max

Sow seeds of cucumbers, tomatoes, aubergines and peppers to raise summer cropsWater compost with a suitable pesticide where vine weevils have been discoveredSow summer bedding plants, such as petunias, geranium, verbena and busy LizzieTake cuttings

Put up shading to reflect scorching sunlight and keep temperatures downOpen all vents on warm days, but close again in the eveningOrder plug plants and seedlings by post, and pot up as soon as they arriveTake leaf cuttings from houseplants

to supportsIncrease shading and ventilation to keep temperatures down on hot daysTake cuttings from hydrangeas, fuchsias, pelargoniums, osteospermums, marguerites, coleus and verbena

cover to continue cropping over winterVentilate the greenhouse on warm daysLine the glass with bubble polythene for insulationPropagate perennials from root cuttings including phlox, rhus and mintPlant bulbs in large pots of compost ready to fill any

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

and out to let in more lightTake root cuttings of perennials including phlox and oriental poppiesPlant hippeastrum bulbsUse rainwater to keep the compost of potted azaleas constantly moistVentilate greenhouses on warm, dry days

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

Plant strawberry runners in hanging baskets, which you can grow in the greenhouse to produce an early summer crop Order seedlings and bedding plants from mail-order suppliersSow dwarf French beans in a large pot for an early crop in JunePlant lily