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July Garden Tips

Garden work for July 2018

Flower garden

It will soon be mid-summer and many of the earlier flowering perennials start to look rather forlorn. It may be worth your while to be ruthless and cut back foliage that is straggling. In particular, hardy geraniums, delphiniums alchemia mollis (Lady’s Mantle) should all benefit from this treatment.

Stake sunflowers and autumn perennials like Michelmas daisies to help them through the time when the wind will blow. Remember to keep your mower blade raised in dry spells, allow the grass to grow to 3cm. Shade and ventilate the greenhouse.

When roses have come to the end of their first glorious flush of blooms, try to give them a feed of a complete fertilizer as this will help with the second lot of blooms. Don’t forget to dead head them as well. Outdoor chrysanthemums will also need a feed, one with a high potash content to help the flowering process.

Early in the month dig up and divide dwarf and intermediate bearded irises if they have been undisturbed for 3 or more years. Tall bearded irises should be treated in a similar way towards the end of the month.

When roses have come to the end of their first glorious flush of blooms, try to give them a feed of a complete fertilizer as this will help with the second lot of blooms. Don’t forget to dead head them as well. Outdoor chrysanthemums will also need a feed, one with a high potash content to help the flowering process.

Vegetables

July is a good time to be buying new strawberry plants, or propagate from your own runners. You should aim to replace all the strawberry plants that are 3 years or over. Remember to remove runners that are not needed.

Plant out sprouting broccoli, calabrese, winter cauliflower, kale and Oriental greens. Place bricks or tiles under developing marrows and squashes as it helps to prevent rotting and will aid ripening.

Early crops of new potatoes, early peas and broad beans will soon be finishing, make sure to clear away the top growth as soon as possible to make room for catch crops such as the round carrots and beetroot.

Complete leek planting as soon as possible. Sow swede by the middle of the month. Lift shallots when their foliage has yellowed and turned over. Make sure to dry them out completely before storing.

Tomatoes should be stopped after 5 trusses have set. If the bottom leaves start to turn yellow it is better to remove them and let the trusses develop in the sunshine. Keep an eye out for any sign of mildew and spray appropriately. The same goes for potatoes. If there is a bad attack towards the end of the month and it is too early to harvest it is better to remove the haulm and burn it safely, or take it to be re-cycled.

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