If May is the busiest gardening month, June is the month of nurture and bringing the garden to its midsummer best. You’ve made those sowings and now’s the time to plant out, protect and pamper. Here are my top ten tips for activity this month. I hope they’re useful.
1. Keep on mulching
Apply loose organic mulches to the soil now to keep it moist and deter weed growth. Choose a mulch to suit the situation, and apply it when the soil is wet and weed free. A mulch can also improve the visual appearance of a bed, and will act as a safe habitat for all sorts of beneficial creatures, such as centipedes and beetles, that eat slugs and other pests. You can use wood chips after they’ve been left for a year, so that when you put them on the soil they don’t rob it of nitrogen as they decompose. Or sow a ‘green manure’ cover crop on any bare ground. Buckwheat, phacelia, mustard and fenugreek are quick growing green manures that can be sown now. They’ll help to improve the ground, suppress weeds, make a good ground cover for beetles and other predators and, if you let them flower, buckwheat and phacelia are very attractive to bees – and people.
2. Fruit fooling
Put netting over ripening soft fruit to keep the birds from getting it before you do. A special fruit cage is great, but a temporary structure covered with netting will do just as well. Strawberries should be forming and ripening fast and other soft fruits are coming on stream (though with the mild winter this all may be a couple of weeks earlier this year). The fruitlets on fruit trees should be swelling. I’ve noticed another good show of blossom on most of my fruit trees this year, as last, and with no frost to speak of, the plum in particular seems to be developing a lot of fruit, so hopefully we’ll have a bumper harvest. Once the fruitlets are visible they can be thinned on apples, pears, plums and other tree fruit – and gooseberries too. This is vital if the ‘set’ has been good to ensure good sized fruit.
It’s also time to start summer pruning trained fruit like plums and cherries as well as trees or bushes. For trees and bushes, after getting rid of dead, diseased or dying branches try to encourage an open, wine goblet shape. Take out strong vertical growth or crossing branches to reduce the weight of the branches and congestion – a maximum of about 10-20% of living material can be removed. Keep watering fruit trees and bushes as much as you can, even after it has rained. Continue to harvest Rhubarb into July. Harvest the stalks with a gentle ‘twist and pull’ motion, rather than cutting them.
3. Veg and herbs
Earlier sowings of vegetables should be growing well now, with some early harvests possible towards the end of the month. I’ve yet to have my first pickings of autumn sown Broad Beans, but they’re on the way! Small, first pickings of the season are always particularly tasty. Don’t wait until everything is fully grown before you start to harvest. Also, if your first sowings and plantings have failed or are looking weak there is still time to sow some more. Runner beans should be in the ground and need to be encouraged to climb up their supports. They twist the other way from most other beans – clockwise when viewed from above.
Keep an eye on Brassica crops, such as cabbages, sprouts and calabrese, which are favourites with many pests, from aphids and whitefly to pigeons and rabbits – net these with a fine gauge mesh for reliable protection and remove insects by hand or water spray. Plant out pots of basil and other tender herbs. Snails seem to love basil, so use plenty of deterrents and controls round new plants. You can also keep Basil indoors, on a sunny windowsill for larger, lusher leaves.
Hoe regularly to keep weeds under control. Keep the blade sharp and hoe when seedlings are small and in dry weather for the best results. Dig out bindweed on sight! This perennial weed hates disturbance, so as long as you can dig it out as soon as it sprouts, it will eventually give up. However, rockeries and shrubberies are difficult. Unless you lift everything out and dig the area over you won’t succeed. Mulching with a durable light-excluding material can work here. But there must be no light, and no holes. The bindweed must be completely smothered.
Create a ‘ Weed End Bag’ – this is a way of ‘recycling’ pernicious weeds, such as bindweed, which you shouldn’t add straight to the compost heap. Stuff the plants into a black plastic sack or an old potting compost bag. Leave in an out-of-the-way corner until it all becomes sludge, then you can compost it.
5. Steady as she goes
Finish off all top-dressing, staking and pruning tasks in the ornamental garden that may not have been completed last month. Cut back spring-flowering clematis this month, and cut down daffodil and other spring bulb foliage now. If possible add a slow release fertiliser (e.g. Fish, Blood and Bone) to feed the bulbs that you’re leaving in the ground – otherwise dig up the bulbs and store in a dry place (important if your soil is heavy and tends to retain moisture which will rot the bulbs left in). Tidy up spring-flowering shrubs now if necessary, by cutting out one third of the old wood to encourage strong new shoots. Forsythia can be hard cut to strong new shoots to encourage new growth that will flower next year. I’ve yet to do this, and the likes of Weigela, Deutzia and Kolkwitzia will also need doing soon, once they’ve finished flowering.
Cut oriental poppies back hard after flowering (mine are later this year, just coming into flower) – ideally, there should be something planted alongside to take over the space (e.g. hardy fuchsias). Deadheading many flowers as they go over this month can result in a second flowering, in particular this is worth doing for your hardy and half-hardy annuals, to ensure their one and only season lasts as long as possible. Perennials will also benefit – for example, later in the month Lupins and Delphiniums can be deadheaded to encourage a second flowering later in the summer.
6. Flower planting
Fill any gaps in your borders with annual bedding plants. Water them regularly, particularly in drier weather and in the days after planting. Watering in hotter months is always better done in the morning or evening, to avoid scorching plants in the heat of the day. Sow biennials such as Wallflowers and Foxgloves for next year. If you are short of space these will be perfectly happy in pots in a sheltered spot until the autumn when they can then be planted in their final positions (though Wallflowers seem to do best in open ground). Water pots and baskets daily – even when it’s raining! Plants are growing vigorously and June sun can be very strong, so watering twice a day is sometimes necessary.
7. Greenhouse care
Temperatures in greenhouses and conservatories will (hopefully) soar this month. Even a couple of days will be enough to cook plants. Ventilation and shading is essential. If you’re going away and have no helpful neighbour, put plants outside, or leave the greenhouse door wide open. Standing a bucket of water in the greenhouse will help to maintain humidity.
8. Green, green grass of home
Lawns don’t need watering. Grass may not look at its best in a drought, but it is a great survivor and will come back again when it rains. Unless you have newly laid turf to water in, leave the lawn to look after itself. Don’t mow the grass too short. Cutting height should be about 2.5cm/1” for the summer. If possible, rake before you mow. This lifts weeds up so that the mower blades catch them.
9. Trimming and growing
Give Box and Yew hedges and topiary and bushes of Lonicera nitida a clip/trim, though, if like here, they seem to be well ahead this year, you might have already done this. Ideally do this on a dull, damp day to avoid the cut leaves of Box turning brown as they dry out in the sun. Give them a feed with a slow release fertiliser after clipping to help them recover. Repeat in September to keep topiary and hedges in a good shape over the winter. When trimming hedges, watch out for nesting birds. Some will still be feeding newly hatched chicks. Leave these areas alone for a few more weeks. June is a good month to take cuttings from some plants, and to save seed from others – early flowering plants, such as Aquilegia and Hellebores, will be setting seed from now on, though the Hellebores seem to have been early this year. If you collect Hellebore seeds before they form a hard seed coat, you can save yourself a lot of time and waiting. The seeds look black and shiny and are still slightly soft and wet. Sow these seeds immediately and they will germinate in a few days, instead of having to wait till the following spring. Take cuttings from hardy fuchsias and penstemons to grow more plants.
10. Wildlife friendly
As we head into summer, bear in mind any little garden visitors you may have. If possible, why not put out a little extra food for birds and also for hedgehogs – warm and overly dry weather can mean there’s a lot less natural food available for these animals. Remember to fill up any bird baths and feeders as often as you can, and consider leaving a small bowl of water out for the hedgehogs too. Contrary to popular myth, hedgehogs should not be fed bread and milk, but actually ordinary cat or dog food is good for them!
Oh, and one last thing- spare some time to sit and enjoy your garden as (hopefully) the warm days of summer arrive!
With thanks to Garden Organic
Old School Gardener
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