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from chrysanthemumsPick faded or yellowing leaves from plants to prevent grey mould infectionsRaise crops in modular trays to transplant into the garden later, such as celery, celeriac, lettuce, parsley and other herbs

Pot up rooted cuttings and young plants that have outgrown their potsSow seeds of marrows, courgettes, squashes, cucumbers and melons in a heated propagatorWater pots and trays of seedlings with a solution of copper fungicide to prevent damping-off diseaseSow summer bedding, such...

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 from new growth on dahlias, pel...

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

Take cuttings from pelargoniums and fuchsias Repot rooted cuttings into containers a size larger, to prevent them from becoming pot-boundCheck plants regularly for signs of pestsPinch out the tips of rooted cuttings to encourage bushy plants

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

Raise lettuce and salad crops in pots for early pickingsWater potted fuchsias sparingly to prevent compost drying out completelyPrune grapevines before they come into growth, when their sap starts risingBring pots of strawberries under cover to encourage early fruitingStart sowin...

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