Trees, Shrubs and Roses
- Young trees and shrubs should be checked for signs of drought, even if the weather is damp.
- Sometimes newly planted trees and shrubs take off immediately, but it often happens that they do not get a great start, are slow to root out and are then very vulnerable to drought.
- These trees do not die right away but fail to make enough reserves in summer to survive the following winter and die at that point.
- Control weeds and grass around the base of youg trees to double the growth rate.
- Continue to spray roses against blackspot disease, especially in the damper parts of the country, after wet weather.
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- While the worst snail attacks are now over, they can still cause serious damage during a few wet days, especially a warm wet night.
- Feed all containers if they have not had slow-release fertilizer pellets added to the compost. The compost will only have enough feeding for a few weeks after planting.
- Watch for greenflies on bedding plants and container plants.
- Patio plants such as petunias, osteospermums and marguerites are widely available in garden centres and can be planted out now.
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- Reduce mowing as the rush of early summer growth peaks.
- If grass is pale and tired-looking, apply a dressing of high nitrogen lawn fertilizer. Ideally this should go on when rain is on the way and the ground is already damp after previous rain. Otherwise there is a chance of scorching.
- Keep lawn edges trimmed for a neat line to borders.
- Apply lawn weedkiller in good growing weather if needs be.
- Sow seeds of wallflowers for planting out in autumn.
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Fruit, Vegetables and Herbs
- Continue to make repeat sowings of fast-maturing vegetables, especially salads that go over quickly.
- Thin out and transplant vegetables that have reached suitable size, and control weeds early.
- During any wet period, spray apple trees for apple scab.
- Spray potatoes for blight - spray warnings are given on radio.
- Feed sweet corn and other tender vegetables to make them grow rapidly.
- Sow seeds of swede turnips for winter use.
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Greenhouse and House Plants
- Continue to feed greenhouse plants and water freely to maintain strong growth.
- Use a shading material if the greenhouse gets too hot.
- Check greenhouse plants for scale insects, greenflies and red spider mites, all of which can build up very rapidly at the time of year with soft growth on most plants.
- Remove excess shoots of a grapevine every couple of weeks to keep it under control and tie in new shoots that are needed for extension growth.
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