May Gardening Tips

Langlands May Gardening Tips


It may be getting warmer during the daytime, but there is still a good chance of a night frost!


  • Hoe-off weeds to prevent getting out of hand.
  • Open greenhouse vents and doors on warm days.
  • Set out the garden furniture on the patio and clean the barbecue... it could be sunny!
  • Turn on the outdoor water supply.
  • Buy stakes and supports in readiness for herbaceous plants, runner beans and tomatoes.
Place a layer of straw mulch around strawberry plants

Flowering Plants

  • Plant out chrysanthemums and dahlias.
  • Plant out early annuals grown from seed, or bought as a young plants, after the risk of frost has gone.
  • If required, divide hostas and agapanthus as they come into growth.
  • Pinch out the young tips of growing plants to encourage bushiness.
  • To encourage new growth, trim back spreading and trailing plants such as aubrietia and alyssum after flowering.
  • Apply liquid fertilizer to bulbs after flowering for a good show of flowers next year.
  • Tidy up or cut back Clematis Montana once it has finished flowering.
  • Check all plants for pests and disease.

Fruit & Vegetables

  • Greenhouse tomatoes are growing rapidly. Tie them in and liquid-feed regularly.
  • Tie up new shoots of trained fruit trees.
  • Sow beans and prepare supporting canes for runner beans.
  • Plant early vegetable plants grown from seed outdoors once the danger of frosts has passed.
  • Forced rhubarb stems can be harvested by gripping them firmly at the base, then pulling them sharply away from the crown.
  • Beetroot and spinach can be thinned out.
  • Earth up potatoes when they are approximately 23cm (92) high.
  • Place a layer of straw mulch around strawberry plants and remove any unnecessary runners.

Trees & Shrubs

  • Remove any newly-sprouted suckers from plants such as Rhus typhina.
  • Tender container trees can be moved outdoors once the danger of frost has passed.


  • Provided the weather is mild and the grass is growing, applications of fertilisers and weed killers can be made to established lawns.
  • Depending on growth, begin regular mowing.

Download the May Gardening Tips Guide:

Download the May Gardening Tips Guide Download