Sowing Zucchini - Vegetable Edibles Care - Plant Care - Bayer Garden

May planner

What to do in your garden in May

What to do in your garden in May


  • Start a weekly feeding programme for houseplants.
  • Get rid of blanketweed in pond by twisting it around a broom handle.
  • Pinch out the tips of bedding plants to encourage bushy growth.
  • Earth up potato stems and keep soil moist.
  • Ventilate the greenhouse on warm days, but make sure vents are closed at night.


  • Prune clematis montana directly after flowering.
  • Prune spring-flowering shrubs such as flowering currant Ribes sanguineum and forsythia.


  • Sow cucurbits from the end of month such as pumpkins, courgettes and cucumbers.
    Push the large, flat seeds into pots of compost, on their sides so that the seeds don't rot. Harden off the young plants gradually, and plant out when frost danger is passed.
    Some cucumber varieties such as Passandra will fruit happily outdoors, but need stout support such as U shaped canes or wigwams. Courgettes can be grown in containers, but choose a compact variety such as Midnight.
  • Sow biennials such as wallflowers, foxgloves and honesty.


  • Plant clematis to transform fences and mature fruit trees. Some patio varieties can even be grown on a support in a large container.
  • Plant out summer-flowering bulbs, tubers and corms, such as dahlia, begonia and eucomis.
  • Plant out summer bedding when frosts have safely passed. Use water-retaining gel when planting in containers to save on watering.
  • Verbenas, pelargoniums, fuchsia, New Guinea busy lizzies are good low-maintenance options. Most types of bedding prefer direct sun, but violas perform better in shade. If you are going to be away a lot during the summer, plant succulents in containers and windowboxes, that need no water to thrive. 
  • Plant out sweet pea seedlings, or buy young plants from the garden centre.
  • Push six-foot wigwams into soil and position two sweet pea plants at the base of each cane and protect from slugs or snails. Weaving string around wigwam canes from top to bottom of structure will give sweet pea tendrils extra purchase. If you have no space for a wigwam or similar structure, buy short-stemmed dwarf varieties that suit containers, such as Knee High.


  • Greenfly and blackfly can be a real problem. Wipe off with fingers and blast with high-pressure water jet or use specialist spray.