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Collect fruits and berries from cotoneaster and pyracantha, and sow their seedsCheck stored bulbs and tubers for signs of rot Bring potted strawberries into the greenhouse or put in a cold frame to protect from coldWash glazing inside and out to let

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

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

Plant bulbs, corms and tubers like achimenes, begonias, gloxinias in potsSow coleus and other houseplantsWatch out for pests, like whitefly and red spider mite, and treat at oncePut a mouse trap in your greenhouse if you find seeds and plants being

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

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

Sow sweet peas and pinch out the growing tips of seedlings for bushier plants Continue harvesting chillies, peppers and other cropsReduce watering potted tuberous begonias to allow the top growth to die downBring pots of tender bulbs like agapanthus

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

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

Wash glazing inside and out to let in as much light as possibleBring potted camellias into unheated porches or conservatories to enjoy early displaysBuy chrysanthemum cuttings or take cuttings from your own plantsSow seed of hardy annuals