Plant out dahlias into their flowering positions. Prepare your planting hole by digging and incorporating well-rotted horse manure or garden compost. At the same time, mix in some fish, blood and bone. When using any products always read and follow the makers instructions, water them in well. With the larger varieties of dahlias, I have found them to benefit from putting a stake with a wire frame around the plants; this stops the dahlias from falling out sideways across the plot and makes it easier when it comes to cutting the flowers.
Regular cutting of sweet pea flowers as they are ready, will keep them producing flowers.
On your roses cut fading flowers, if any leaves are showing signs of black spot remove them, these should be burn and not added to the compost heap.
Plants like bearded irises can now be lifted, divided and replanted. If they are, suffering from overcrowding this should only, be done after flowering has finished.
Shrubs like Lilac and weigela just to name a couple, when they have finished flowering give them a prune back to a fresh strong shoot. When pruning Lilac bushes remove any suckers, which may be present.
Plant out summer bedding like marigolds, petunias and geraniums just to name a few. There are good selections in the garden centres now, if you have not grown your own plants from seeds.
Check for sign of greenfly and spray if required, check with the garden centre to find out what sprays are available.
Fruit and vegetable Garden
Finish planting out your tomatoes and cucumbers in the polytunnel or greenhouse; give them the best possible start by digging a planting hole, mixing in some well-rotted horse manure or garden compost.
By now, you should have earthed up all of your potatoes.
Plant out runner beans, tomatoes, cucumbers; marrows, courgettes.
Remember to pinch out, side shoots on your tomatoes if you are growing varieties like moneymaker, Alicante or sungold just to name a few.
Continue to sow beetroot, lettuce, carrots, turnips and swede.
Net over your soft fruit bushes if you have not already done so, fruits like strawberries, red, white and black currents, this with help stop the birds from stripping off the fruit.
Start picking the early strawberries as they become ready, as you pick over the plants, remove any which are turning bad on the plants, to stop this from spreading through the rest of your crop.
Continue to keep the hoe moving around the onion bed, add a top dressing of potash and blood, fish and bone to give the onions a good feed. When using any products always remember to read the makers instructions.
Continue to water runner beans; also give them a spray to help them to set flowers.
Plant out the sweet corn plants, one I have found to grow well on clay soil and produces some very nice size cobs is called ‘Mainstay’, make sure you water them in well to give them a good start.
Pot up any small chilli plants into the next size pots and grow them on.Plant out pumpkins and squashes, if you have not already done so.
Continue to mow the lawn areas, add the grass cuttings to the compost heap, mixing with other material to help it rot down well.
Keep moving the hoe around your plot and borders, to remove those unwanted weeds.
Continue to feed and water all of your plants in pots, indoors and out.
Continue to tie in any new shoots on plants, which require it.