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Buy plug plants and young bedding plants to grow on for baskets, pots and bedding displaysThin out heavy fruit sets on peaches and nectarines, leaving fruits about 10cm apartSow annual climbers, such as cup-and-saucer vine (Cobaea), nasturtium

-off diseaseSow summer bedding, such as tagetes and dahliasMove young plants into cold frames to acclimatise them to cooler conditions

to encourage early fruitingStart sowing seed of summer bedding and crops that need a long growing season to mature, such as pelargonium, petunia, verbena, salvia, lobelia and begonia

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

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

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

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

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 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