Sow spring cabbage, winter lettuce, pak choi, turnips and beetroot for autumn and winter harvesting. Continue successional sowings of lettuce, rocket, radish and spring onions every two to three weeks. Sow quick-maturing French beans for a late crop. Sow chicory and radicchio for winter salads. Wallflowers and forget-me-nots for spring colour next year can be sown now. July is also a good time to sow green manures such as mustard, phacelia or crimson clover on any bare vegetable beds that won't be used until autumn.
Plant out autumn and winter brassicas: broccoli, Brussels sprouts, kale, winter cabbage and cauliflower. Plant leek transplants if not done in June. Take semi-ripe cuttings of lavender, rosemary, box, hydrangea and other shrubs. Plant autumn-flowering bulbs such as colchicums and autumn crocuses. Replace spent spring bedding in containers with summer flowers. Pot up strawberry runners to create new plants for next year.
July is peak harvest season in Irish gardens. Tomatoes, courgettes, cucumbers, French beans, runner beans, peas, beetroot, carrots, new potatoes, onions and lettuce are all cropping abundantly. Strawberries continue, followed by raspberries, gooseberries, blackcurrants and redcurrants. Pick courgettes small for the best flavour and to encourage more fruit. Harvest herbs regularly — this is the ideal time to dry or freeze surplus. Cut lavender for drying when the flowers are just opening. Lift garlic when the lower leaves begin to yellow.
July lawns may slow down if the weather turns hot and dry. Raise the mower height to help the grass cope with drought stress. Avoid mowing in very hot, dry conditions as this stresses the grass. Water new lawns if rainfall is insufficient. Leave the mower clippings on the lawn during dry spells as a natural mulch. Avoid applying fertiliser during drought. Plan autumn lawn renovation — aeration, overseeding and feeding.
Deadhead roses and flowering perennials relentlessly to encourage continuous blooming. Feed tomatoes, peppers, cucumbers and other fruiting vegetables weekly with high-potash liquid feed. Water all containers thoroughly — daily in hot weather. Train and tie in climbers and wall shrubs. Watch for signs of drought stress and water deeply when needed. Check greenhouse ventilation and shading — temperatures can soar rapidly. Prune plum trees and cherries in summer to reduce the risk of silver leaf disease. Summer-prune trained fruit trees (cordons, espaliers, fans). Order spring-flowering bulbs for autumn planting.
July is typically the warmest month in Ireland, with average temperatures of 15-20°C and occasional heat waves exceeding 25°C. The east coast and Midlands tend to be warmest, while the west coast benefits from cooling sea breezes. Rainfall varies considerably — some Julys are gloriously dry while others bring persistent rain. Humidity levels can be high, encouraging fungal diseases on roses, potatoes and fruit. Continue blight watch on potatoes and tomatoes. Gardens in Kerry, West Cork and Connemara are particularly stunning in July with fuchsia hedges and montbretia in full bloom.
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