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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

Buy pansies and other winter bedding plug plants to grow on under coverDamp down the greenhouse floor every morning on hot daysWater plants in pots and growing bags every morning, and again at night if necessaryAdd liquid feed to at least one

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

Increase greenhouse shading if temperatures inside are getting very hotTake cuttings from houseplants such as weeping figs and Christmas cactiDamp down the greenhouse floor every morningWater pots and growing bags dailyPlace potted tagetes near

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

Regularly water crops in pots and growing bags, daily if needed in warm weather Plant trailing tomatoes in hanging basketsFeed young plants weekly with a solution of liquid fertiliserVentilate the greenhouse during the day, but close vents

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

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

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 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