June is the month when we can really enjoy the fruits of our labours. The weather is warm (hopefully!), the evenings are light and gardens are looking at their finest. Here are 10 gardening jobs to keep your garden blooming and veg patch cropping as mid-summer arrives.
1 Remove rose suckers
Roses can produce unsightly ‘suckers’ – vigorous, ugly shoots which rise from the roots. These stand out as they’re often pale-leaved and lighter in colour than the dark, glossy foliage of the rose itself. It’s tempting to grab the secateurs and chop suckers off, but this actually encourages more to grow. Instead, carefully dig down to expose where the sucker is emerging from, then twist and pull it away with a gloved hand.
2 Watch out for lily beetle
Throughout June, lilies are growing fast and flower buds are swelling. Keep a lookout for bright red lily beetles which can decimate plants if left unchecked. These pests, which have run riot across the UK since the 1990s, are easy to spot, as adults have bright scarlet shells. There are other tell-tale signs of lily beetle trouble: sausage-shaped eggs on the underside of leaves and red-brown larvae, which are often hidden in sticky black excrement. Adult beetles should be removed and squashed on sight, while larvae can be controlled with a spray of bug killer.
3 Snip faded blooms
Develop a routine of dead-heading several times a week. Sweet peas run out of steam quickly if spent flowers are left to go to seed, so remove faded blooms promptly – or cut their wonderfully scented flowers for the vase – and more will follow. Roses will thank you for regular dead-heading, too, by repeat flowering into autumn. Remember to dead-head Oriental poppies after flowering, while foliage can be chopped down to ground level; a proven way of encouraging fresh growth of leaves and possibly more flowers.
4 Harvest early potatoes
Nothing beats the taste of home-grown spuds, and first-early potatoes should be ready to lift in June and July (about 10 weeks after planting). But how do you tell when your crop is ready? Traditionally, gardeners were taught to wait until flowers open or buds drop, but there is a cheat. Carefully drawback soil with your fingers until young spuds are visible. If tubers are the size of a hen’s egg or bigger, they’re ready to harvest. Take the biggest to eat now, and leave the remainder in the ground to carry on growing.
5 Sow biennials
June is a perfect time to sow biennials – plants that develop foliage and roots in their first year and flower in their second year, such as foxgloves and sweet William. Prepare a seedbed (a spare bit of veg patch or flower bed will do) by digging the soil and raking it to a fine tilth. Sow biennial flowers thinly in shallow drills and keep the area well-watered. Once seedlings are up, thin them out to prevent overcrowding, and avoid damage by putting down organic slug pellets. In early autumn, plants can be transplanted into their final flowering positions.
6 Lift tulip bulbs
Once flowering is over and leaves have died down, it’s time to dig up tulip and hyacinth bulbs. Neither like being left in garden soil over summer, where dormant bulbs are prone to rotting or pest invasion in damp conditions. Instead, store bulbs in shallow trays in a cool, dark garage or shed over summer. Other spring-flowering bulbs, such as daffodils and bluebells, can remain in the ground.
7 Water wisely
There are tricks that can save you time and money when watering while ensuring that plants benefit most. To avoid water loss due to evaporation, water first thing in the morning or just before dusk, when temperatures are lower. Don’t drench entire flower beds. Instead, direct water at the base of the plant, allowing it to soak into the soil before repeating. Avoid spraying foliage when it’s in direct sunlight, or you risk scorching the leaves. Hanging baskets may need to be watered twice daily during hot spells. Don’t water established lawns though, because parched grass will recover when autumn rain arrives.
8 Thin overloaded fruit
Would you like big, juicy fruit in autumn, or a tree laden with tiddlers? For most of us, it’s a no-brainer, and that’s why it pays to remove excess fruit from trees so the remaining crop improves in size and quality. Many trees naturally drop small fruits in early summer (known as June drop), but further thinning may be necessary on apples, pears and plums. Thinning also allows sunlight to reach the fruit, helping it to ripen evenly. Thin dessert apples to one or two fruits every 10-15cm and pears to two fruits every 10-15cm. With plums, leave one fruit every 5-8cm. Keep fruit trees well-watered during dry spells.
9 Add fish to ponds
Keeping coldwater fish is a fascinating hobby, so stock up your pond now. Sit the bag containing fish at a shady edge of the pond for an hour, so the water in the bag gradually equals the temperature of the pond. Carefully open the bag but don’t pour the fish out; instead, allow them to swim out in their own time. It’s normal for new fish to hide for the first week, so don’t be alarmed if they disappear. If blanket weed is a problem, remove it by dipping a cane into the water and ‘twirling’ the weed around it. Leave the weed by the side of the pond, allowing time for wildlife to crawl back into the water. Top-up ponds if necessary using rainwater from water butts; chlorinated tap water may upset the balance of a pond.
10 Make compost
In mid-summer, our gardens produce a lot of waste, much of it comprising grass clippings. You may not think anything of piling the compost bin high with grass, but a bin filled with a good mixture of garden waste will help the contents rot down faster. For best results, mix grass clippings with spent plant stems, shredded paper, vegetable waste from the kitchen and prunings. Don’t allow compost bins to dry out in hot weather – keep the contents moist but not saturated. To speed-up composting, use a garden fork to regularly turn the compost heap. And when adding grass clippings, mix in a spadeful of garden soil, too.
What else is on your gardening jobs list in June? And what’s your favourite garden job this month? Let us know in the comments.
Marc Rosenberg bio
Marc Rosenberg is a freelance garden writer and editor. A former journalist with Amateur Gardening and Horticulture Week magazines, he holds seven Garden Media Guild Awards. Marc has written for publications including The Garden magazine, BBC Gardeners’ World and RHS online.