Watering and weeding duties step up a notch – the tunnel/greenhouse in particular will require a good deal of water from now on. Watch the weather and water outside as required. Water in the morning if possible. Add a good dressing of mulch around plants to reduce moisture loss and keep down weeds. Continue to earth-up potato plants to prevent the spuds becoming green. It's time to get really seriously vigilant with your tomato plants – mulch, water and continue to remove side shoots that appear in the leaf axils. Train the plants carefully on strings or strong canes. If gooseberry and red current bushes are very leafy, start summer pruning by shortening back the new growth. Tie up beans and peas to stop them falling over – mature pea plants become like a canopy and could take off in the wind, bound for next door's garden. Stake everything that grows tall – raspberries, peas, beans, tomatoes etc. Net soft fruit against birds – it's worth the effort. They will eat your entire crop practically overnight if you let them. Thin beetroot in rows to single plants – for large roots space about 10 cm apart – for mini-beets space at 3 cm. Eat the leaves in salads – but sparingly.
Remaining sowing can most likely be done outside. Sow courgettes, pumpkins, summer and winter squash, fennel, chicory. Succession sowing is vitally important to keep a regular supply of produce coming. So continue sowing: beans (French and Runner), kale, pea, spinach, spinach beet, summer broccoli, carrot, swede, leek, lettuce, Brussels sprouts, beetroot, chicory, endive, turnip, kohlrabi, fennel. Sow Parsley now to provide a late supply in Autumn and some of the plants can then be lifted, potted and brought indoors for Winter use.
It's time to plant out pretty much anything else which has been raised indoors or undercover and needs transplanting, e.g. leeks, Brussels Sprouts, cabbage, autumn cauliflower, calabrese, sprouting broccoli, celery, celeriac, cucumbers, pumpkin, courgettes, marrows, runner beans, aubergine.
June is a busy month for the GIYer but it's also the month when we really start to see some payback - the first broad beans and peas as well as new potatoes, new carrots, soft fruit like gooseberries, cherries and strawberries. You may even see the first tomato (but more likely in July). Herbs are in full flow. Harvest broad beans, peas, kohlrabi, cabbage, cauliflower (month end), spinach, spring onion, shallots, salad leaves, elderflower, rhubarb, salad leaves, onions, carrots, beetroot, garlic, sea-kale.