Gardeners diary for June
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General tips
  • Grow annuals and flowering herbs which encourage beneficial insects into your garden.
  • Keep your eyes open for pests and diseases in the greenhouse and the garden, and take appropriate action immediately to stop the problem getting out of hand.
  • Weed regularly.
  • If the weather is dry be prepared to water new plants, seedlings and other vulnerable plants.
  • Ventilate the greenhouse and apply shade paint if necessary. Damp down if the weather is hot
  • Use contact weedkiller to control rampant weeds; its not too late to mulch.
  • Use fungicide on plants prone to mildew in dry weather.


  • Progressively lower the mower blade.
  • Trim your lawn at least once a week to keep it neat and dense.
  • Trim lawn edges each time you mow.
  • If not done last month, re-cut and repair ragged edges.
  • Apply lawn fertiliser and, if necessary, a weedkiller to established lawns.
  • Alternatively treat weeds individually with a spot weeder or dig them out with an old knife.
  • Remove any coarse grasses by hand.


  • It is essential to keep all container plants well watered
  • Tidy spring containers. Remove fading spring bedding plants and replant.
  • Plant up summer containers. Plant containers with summer bedding once the threat of frosts has passed.
  • Feed container-grown shrubs and perennials
Beds & Borders

Annuals and biennials

  • Support tall-growing hardy annuals.
  • Plant half-hardy annuals and bedding plants..
  • Sow biennials for next year
  • Deadhead annuals to encourage more flowers.
  • Plant out annual climbers such as sweet peas, morning glory and black-eyed Susan.
  • If a late frost is forecast in your area protect tender bedding plants.
  • Sow fast-maturing annuals for a succession of colour.
  • Water new plants during any dry spells.
  • Cut down sweet williams and foxgloves after flowering to get another year of life.


  • Put plant supports and stakes in position.
  • Remove weak new shoots from dense-growing perennials, such as phlox.
  • In colder areas plant new perennials and cut back evergreen ornamental grasses.
  • Sow new perennials in nursery rows.
  • Finish planting out early-flowering chrysanthemums.
  • Divide primulas and collect any seed; sow it fresh on surface - do not cover; it will germinate next spring after frost


  • Clear away dead foliage of spring-flowering bulbs.
  • Stake tall-growing lilies


  • Spray bush and climbing roses with fungicide and insecticide mix.


Shrubs, Trees and Climbers
  • Check tree ties.
  • Check mulches and replace if necessary.
  • Clip fast growing hedges such as privet, after checking for wildlife.
  • Prune spring flowering shrubs.
  • Prune ornamental cherries
  • Cut back unwanted growth on clematis montana after flowering
  • Take cuttings of non-flowering shoots on philadelphus, ceanothus, lavender and other shrubs.
  • Train climbers.


  • Transplant autumn and winter brassicas
  • Transplant leeks to permanent position.
  • Sow chicory/radicchio in permanent position.
  • Sow lettuce, radishes, spring onions. All crop in about 6 weeks.
  • Sow beetroot, early carrots and turnips these crop in 8-10 weeks
  • Sow over wintering vegetables like chicory, sprouting broccoli and oriental greens to fill gaps.
  • Warm-soil lovers like courgettes and French beans can still be sown for late summer harvest.
  • Endives are sown from June onwards.
  • Cress can be sown all year. Add flavour to your sandwiches!
  • Onions can be sown from July onwards, spring onions from now until the end of July.
  • Plant peas, leeks spring onions, spinach, lettuce, calabrese, cauliflower, radicchio, sprouting broccoli (use ground from lifted potatoes), carrots, fennel, courgettes, cucumber, and celery.
  • Plant out tomatoes, sweetcorn french beans and courgettes sown indoors.
  • Most lettuces can be planted from spring until the end of September or October.
  • Ensure climbing plants like cucumber are tied in to canes against late storms.
  • Stake sprouts and earth up.
  • Draw soil away from developing onions to hasten ripening
  • Hoe up soil around potatoes.
  • Tap tomatoes to encourage pollination; water every day and start feeding weekly once fruits set and protect tomatoes from wind
  • Feed courgettes.
  • Thin spring-sown roots and leaf crops including carrots, lettuce and spinach.
  • Pinch tops from broad beans to prevent black fly.
  • Remove eggs on brassicas.
  • Some things are easy to grow and take minimal effort. Spinach, swiss chard, flat-leafed parsley, kale, beans , rocket, potatoes and courgettes are all great beginners' plants. See our vegetable guide for more information.


  • Plant out basil, pick summer savory, and thyme
  • Build a collection of herbs. Basil, sorrel, dill, borage, chamomile, capers, chervil, coriander, tarragon, parsley, chives, rue, sage, wild fennel, lavender, sweet marjoram, lemon balm, oregano, summer savory, thyme, and lovage can be sown now.
  • Net fruit against birds.
  • Cut out excessive growth of new canes of Raspberries, tie in canes being retained to fruit next year.
  • Pick small berries of gooseberries to encourage larger growth on others. Pick as fruits ripen.
  • Lay straw or newspaper between rows of strawberries and net against birds; peg down runners for later transplanting.
  • After June drop, reduce clusters of apples to 3-4, remove any apples fallen in June drop and any misshapen fruits.
  • Spray for aphids and place moth traps in trees.
  • Spray against scab and mildew.
  • Put up the sticky traps for whitefly.
  • Plant greenhouse tomatoes and peppers, in an unheated greenhouse, plant in growing bags or border soil.
  • Feed greenhouse tomatoes and circubits, removing growing tips and side-shoots as necessary.

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