What To Do In The Garden in June

At this time of the year you'll find a fabulous selection of summer bedding at our newly re-opened Garden Centre in Birmingham. Plant the bedding out in borders and containers this month to achieve a wonderful display of colour and here are some other jobs to do in the garden in June.

Created by David Coton on Sunday, 27th of May, 2018.
Updated on Wednesday, 27th of May, 2020.

Patio container plants

If you have a small garden or just a balcony, try growing vegetables and herbs in pots and planters. Use multi-purpose compost, add slow release fertilizer and choose compact varieties. Bush tomatoes, salad leaves, beetroot, chillies can all be grown successfully, even French beans in a large planter.

Container grown plants, particularly in terracotta pots, will need watering every day, do this in the evening so that the water isn't immediately evaporated and target the roots rather than foliage. Alternatively set up an automatic watering system.   

If your hedges are beginning to look untidy, there might be nesting birds present so just trim them lightly so they keep in shape.

To make a feed that's free and as good as any commercial alternative, collect comfrey by cutting plants at the base, cut up the stems and shove all you can into a bucket. Fill with water and put aside for three weeks. Dilute this comfrey 'tea' approximately 1 part to 20 parts water and your plants will love it.

Looking After The Lawn

If your lawn had a spring fertilizer applied and there has been a decent amount of rain, the grass should be thriving. So you can lower the blades on the mower while cutting the grass once a week.

During dry weather raise the lawn mower blades, water generously every week or ten days and leave the cuttings on the grass to conserve moisture. If your lawn needs a tonic or re-sowing, there are plenty of grass and lawn care products. 

Whether in your lawn, or on the drive, weeds need to be controlled either manually or with weed killer before they proliferate. If you have bindweed, eradicate every piece of root, catch dandelions, ragwort and groundsel before they seed, and dig up the long tap roots of docks and plantains. In the flowerbed and vegetable patch, hoe when it's dry so the annual weeds die swiftly.

Spring Flowering Bulbs And Plants

It's the purpose of foliage to reinvigorate bulbs after they have flowered, by June it will have yellowed and died back, and so can safely be removed.

Collect seed from Hellebores, Primulas and other self-seeding perennials in a paper bag, sow straight away in moist compost and you'll have new plants ready for the garden in the autumn.

Clear away forget-me-nots when they are finished and fill any gaps in the borders with colourful annuals, fork compost into the soil before planting and keep moist.

The Vegetable Garden

carrot growing in gardenAfter hardening off, tender vegetable plants such as courgettes and squash can now be planted out together with marrows and other squashes with plenty of space between them.

Sow Peas, French Beans and Runner Beans. Thin out rows of successive sowings of Lettuce, Rocket and Carrots to provide a continuous supply of fresh vegetables.

Plant outdoor tomatoes now that the nights are warmer. Bury deeply up to the first leaves 18 – 24ins apart supported by strong canes. Plant east-west for maximum exposure to sun light.

Support Broad Beans so that they will survive batterings from bad weather, and cut off the top few inches of the growing stem to thwart black fly and concentrate energy into the pods..

Leeks and sweet corn are hungry feeders and will benefit from a high nitrogen feed. 

It's worth checking whether your early potatoes are ready to harvest, if planted in April they will be soon. Don't wait for flowers as they aren't always produced. Continue to earth up the main crop, not only does this protect tubers but suppresses weeds as well.

Sow annual herbs such as parsley, basil and coriander. If garlic has gone to seed, remove the seed heads.

Keep on top of weeds with a sharp hoe, preferably in the morning on a dry day, cutting just below the surface and then leave them to dry out.

In The Greenhouse

Make sure the greenhouse is well ventilated on hot days by opening windows and doors. Provide shade by either using blinds or painting the glazing.

Feed tomatoes when the first fruits set with a specialist feed that's high in potassium and continue to remove side shoots.

It's safe now to move any overwintering citrus plants outside, but every three years they need re-potting using fresh compost. Add grit so that essential drainage is maintained, and this is also helped by raising the pot above ground.

Only water citrus plants when the soil is completely dried out, then add tomato feed or liquid seaweed, and make sure the water flows through rather than remains in the container.

Maximising Fruit Crop

plums growing on treeFruit that doesn't pass muster falls off early, it's the natural June drop to get rid of the weak so that the strong will prosper. You can help this process by thinning apples to one per cluster, reduce pears to two per cluster, 4 - 6ins apart. Plums tend to be heavy croppers, putting great strain on the branches, so thin to two fruits every six inches.

Tie raspberry canes in to prevent them falling over. They can spread rapidly, so dig up any shoots that have ventured too far and consign them to the compost bin.

Mulch strawberries, this raises them off the ground, keeps them clean and lessens the chances of rot or slug damage. Peg down runners in pots of compost to form new plants.

Birds love berries, but so do we. If a purpose built fruit cage is out of the question, use netting secured by pegs to protect the fruit. Also hang anything nearby that is shiny and reflective such as strips of aluminium foil, CDs and tin cans.

In hot weather remember to keep new fruit trees well watered. Add a layer of compost and slow release fertilizer around the base of patio fruit trees.

Flower Garden

delphinium growing tall in a gardenDeadhead roses regularly, this will encourage repeat flowering varieties to form new shoots and buds. For bush and single bloom varieties cut back the stem by about six inches to a sturdy leaf. On multi-flowering roses, just pinch off the bloom and then when all the flowers have faded prune the stem. On non-repeat flowering roses cut the stems back by a third.

Others plants that benefit from dead heading include rhododendrons, camellias and azaleas.

Early planted sweet peas will need to be tied in, if you were late planting them, pinch out when they are about 6ins to encourage bushier growth. Keep them well watered.

Clematis, which are notoriously greedy when starting to flower, will benefit from a liquid seaweed or tomato feed. Train shoots with string to keep the clematis compact and tie in new growth on jasmine and other climbers.

Dahlias from a garden centre are best hardened off in a cold frame. Plant out about 12ins apart in a sunny, fertile location after incorporating organic matter. Adjacent stakes can be used to support them, remove the tips on leading stems when the plants are about 1ft tall to encourage bushy growth.

In dry weather clumps of geraniums, geums and lady's mantle can be invigorated by cutting back and given a high potash feed.

Stake tall growing perennials such as delphiniums

Lift and divide Irises, primulas and primroses after they have finished flowering.

Shrubs that have flowered in the spring can be pruned back so that they keep their shape.

Keep hanging baskets well watered and feed every fortnight.

Divide bamboo now that it is actively growing.

Sow biennial seedlings such as wall flowers and foxgloves, tap the seed evenly onto damp compost, cover with a fine layer and press down. Don't allow to dry out and transplant after germination into plugs or pots. Transplant when large enough to flower next year.

Take softwood cuttings. Cut off a 2 - 4in long piece of new growth just below a leaf joint and remove the lower leaves and then dip into a rooting hormone powder. Pot or place several cuttings in a tray, cover with a plastic bag and place in a warm light position but out of direct sun light. Ensure the compost is kept moist and rooting should take place in about six weeks.

When your lavender is at its best, snip off the flowerheads to make lavender biscuits or dry them for pot pourri.

Shop now for Plant Feed and Fertilizers

Attracting Wildlife

Butterfly on garden buddleiaEncourage bees into your garden with nectar rich flowers such as lavender, honeysuckle, evening primrose and foxgloves. Butterflies will be attracted by buddleia that can be planted when the soil has warmed, it's easy to grow but prefers alkaline conditions.

By providing fresh water in a bird bath each day birds will become welcome visitors, and you should continue to provide bird food throughout the year not just winter. Read about this and many other tips in our blog How To Attract Wildlife Into Your Garden.

What To Do In the Pond In June

As with the rest of the garden, your pond will be the scene of intense activity during early summer,  It's a particularly busy and interesting time of the year as both fish and plants thrive in the warm water.

Stocking New Fish

June is the ideal month to add fish to a pond, just try not to go overboard introducing too many at one time or overstock your pond. Also bear in mind that if you want a wildlife pond then it's unwise to add ornamental fish as they will, for example, eat tadpoles.

Always use a supplier who is a member of Ornamental Aquatic Trade Association (OATA), as you can be assured that the livestock is well looked after to set standards. We are an OATA member and we pride ourselves on looking after pond fish such as Koi, Goldfish, Sturgeon and many more species to a high standard.

When you buy your fish they should be in a polythene or similar type of bag which will be tied. You will usually float this bag on top of your pond, making sure that the water in the bag has equalised with the temperature of the pond water.

If the weather is hot, be careful as the temperature in the bag may rise rapidly in a similar way to a greenhouse, harming and maybe suffocating your new fish. The best way to avoid this is to cut open your bag so that a good supply of oxygen can get to the fish. You can also dip the bag every so often so that the water in the bag acclimatises more slowly.

Improving Water Quality

goldfish in garden pond eating foodA pond vacuum will remove unwanted silt and sludge from the bottom of the pond. Doing this on a regular basis will prevent water pollution and is especially important when you are adding more livestock to the pond.

There are various pond treatments available to improve the water quality and eliminate various fish problems. However, be careful if you're using chemical treatments, many of these can take oxygen out of the water. This is especially important if the weather is hot as the heat will already have reduced the oxygen levels in your pond water. To increase oxygen levels and improve water movement you can consider installing a water feature or fountain.   

Particularly if you pond is subject to prolonged periods of sunlight or has been topped up with tap water, you may continue to struggle with blanket weed and algae for which there are natural and chemical solutions.

Green water will also be more common at this time of year, if you haven't already then you will need to change your UV lamp in your UV Clarifier so that it is at optimum strength. If you do not have a UV clarifier you could use a treatment such as Blagdon Green Away which will kill the suspended algae but you need to add a sludge treatment to consume this algae afterwards.

See our other Monthly Garden & Pond Blogs

What To Do in The Garden in January What To Do in The Garden in February What To Do in The Garden in March
What To Do in The Garden in April What To Do in The Garden in May What To Do in The Garden in June
What To Do in The Garden in July What To Do in The Garden in August What To Do in The Garden in September
What To Do in The Garden in October What To Do in The Garden in November What To Do in The Garden in December

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