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outside. Harden them off for a week by standing them outdoors during the day and bringing them indoors at night. They can then be planted out in their flowering positions in the garden.AdamAllow a few dahlia flowers to set seed for collection at the end

to wait until these are ripe before collecting seeds. In addition to agapanthus I've regularly developed viable seeds on eucomis and galtonia, too. These can be collected and sown, but you'll need patience if you want these to flower, as seedlings of most

one small, inexpensive seed.Sweet peas aside, annual climbers are rarely seen in borders, but they're easy to grow from seed with a heated propagator in a greenhouse (or a frost-free porch or indoor window sill).Annual climbers are often grown as fast

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

Dig out lawn weeds, such as daisies and dandelionsWatch out for greenfly and blackfly developing on shrubs, perennials and roses, and spray with a soft soap solution if infestations are badCollect hellebore seeds from ripe pods, and store

from shrubs bending under the weightPick faded flowers off pansies to prevent them setting seedCollect and sow seed from garden shrubs and trees with berries

Deadhead pelargoniums and other summer bedding plantsSummer prune wisteria, cutting back whippy sideshoots to about 20cmWater plants in pots and basketsTake cuttings from shrubs choosing non-flowering shootsCollect seed from flowers that you want

perennials and bedding plantsCollect seed from any flowers you fancy propagatingTrap earwigs among dahlias with upside-down pots stuffed with straw and balanced on canesPick leaves off plants affected by rose blackspotTrim conifer hedges and evergreen hedges

lots of organic matterPrune lavender to maintain its shape, and take lavender cuttings by pulling off sideshoots and inserting them in trays of gritty compostCollect seed from border perennials and store in a sealed container in a cool place

Clean out bird boxesLevel out dips in lawns with loam-based compost and sow fresh grass seedClear away debris that could be sheltering slugs and snailsCheck bonfires before lighting, in case they are sheltering sleeping hedgehogsSend off for seed