What to do in your garden in June
How time flies it’s June already, so let’s hope summer really is here and we can enjoy those long warm, sunny days! This is the ideal time for outdoor sowings of a number of seed varieties, plus, with the warmer weather, the raising of foliage plants. Preparation of the ground for bedding plants can now be done, as well as thinning out plants that have already been sown. And the ideal time to prepare the greenhouse against hot days by either using shade netting or a shade paint.
Table of contents
- Sowings can now be made outdoors of alstroemeria, achillea, arabis, canterbury bells, coreopsis, erigeron, myosotis and sweet william seeds.
- Sow in the greenhouse polyanthus, primrose and pansy for autumn planting to flower in spring.
- In early June apply general purpose-pelleted organic fertiliser prior to planting out summer bedding plants.
- Thin out hardy annuals sown direct in their flowering positions.
- Plants in the home are always popular and June is an ideal time to raise foliage plants such as coleus and the sensitive plant (mimosa pudica).
- To brighten up winter and spring displays indoors, make sowings of calceolaria, cineraria and primula obconica.
- Although it will be some time before they flower, sow cactus and the amazing strelitzia seed.
- If you have any spare bedding plants left over such as celosia, begonia, geranium or impatiens (busy lizzie) pot them up to provide a colourful display in a light porch or on a windowsill, to provide colour throughout the summer.
- The danger of frost will have now hopefully passed, and young bedding plants that have been grown on under protection during spring can be planted outdoors ready for those beautiful displays, or into summer hanging baskets and containers.
- When using containers or hanging baskets remember not to fill them right up to the top with compost but leave a small gap so that when watering it will soak in and not run over the edges.
- It will also prove very beneficial to give your potted plants a weekly liquid feed to improve growth and flowering.
- When planting out debud/deflower the plants as this will encourage them to grow a better root system and produce the required flowers.
- A number of young plants would also benefit by having their shoot tips pinched out which encourages branching.
- By pinching out the shoot tips bushier plants develop along with more stems leading to more flowers.
- To encourage strong growth along with a good flower display sprinkle rose fertiliser around the roots.
- If it doesn’t rain during the first week or two gently water in or use a hoe being careful not to harm the roots.
- Remove any dead foliage from spring flowering bulbs, with the exception of daffodils and tulips which could be left a little longer but do take off any seed-heads that may appear. However, if possible, it is best to allow the foliage to naturally die back.
- Lilies that are in pots will be growing quickly at this stage of the season, with the flowers starting to develop, and could very well need a few canes for support.
- Lilies in garden borders may also need to be supported if they are not close to neighbouring plants.
- Plant out greenhouse raised brussels sprouts, cabbage, celery, courgettes, cucumbers, marrows, runner and french beans.
- Beetroot, carrots and lettuce rows can be thinned out and further sowings can be continued.
- Remember smaller crops will be produced when over-crowded sowings are made, and any unwanted seedlings should be carefully removed.
- In the case of pumpkins, courgettes and marrows hand pollinate to encourage good fruit set.
- Protect carrots from carrot fly and cabbages from caterpillar damage by covering the crop with Envirofleece or Enviromesh.
- When digging up early potatoes take care not to pierce or damage the tubers.
- Keep the greenhouse well ventilated during the day as temperature fluctuations caused by quite hot temperatures in the day, then going cool at night could very well affect tomato plants fruiting. Also tapping the flowers of greenhouse tomatoes will improve pollination.
- Inspect fruit bushes and trees for pest and diseases, and treat as necessary.
- As new canes of raspberries and blackberries appear, tie to support wires but remember to keep them away from last year’s growth as this will flower and fruit this summer.
- It is a good idea to either use a fruit cage or drape netting over soft fruit bushes such as currants, as well as strawberries which are either growing in rows or containers, to prevent birds, especially blackbirds, from stripping unprotected plants of their fruit.
- Strawberry crops that have been kept under glass, cloches or fleece should now be uncovered so that pollinating insects can gain access.
- Also if strawberries are being grown in a greenhouse open doors fully now.
- Rooted chrysanthemum cuttings and summer-bedding plants that have been hardened off in the greenhouse can be planted into their flowering places.
- Don’t let plants wilt so remember to water them regularly.
- A weekly feed with a high-potash liquid tomato feed should be given to cucumbers, capsicums and aubergines.
- Prepare for hot days by either using shade netting or a shading paint.
- Fish should be checked from time to time to ensure they are healthy, and if necessary treated with the appropriate remedy.
- Do not allow algae build up.
- Blanket weed must be removed from the pond by either using a rake or cane. It is best to leave it at the edge for a day or so enabling any creatures that may be caught up in it to make their way back into the water, then it can be placed on the compost heap.
- Pests such as snails should be kept out of the pond so check any new plants before placing in the water. This is best done by taking them out of the pot, place or hold plant under running water and then re-pot into fresh soil.
- Use a feed which is high in phosphates for feeding established plants.
Suttons Seeds recommend these areas which may also be of interest.
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