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Things to do in your Mapesbury garden in May:

  • Continue to weed the borders with either a hand fork, or by using a hoe on a sunny dry day, the weeds will wilt and die in situ.

  • Deadhead Azaleas, Rhododendrons, Camellias, tulips etc once flowered, this will encourage the plant to concentrate itís energy on producing next yearís flowers, rather than seed this year.

  • Hostas and Delphiniums are particularly attractive to slugs and snails. Deter using Ferrous phosphate slug pellets, which claim not to harm any vertebrates.

  • Finish staking tall summer flowering perennials, before they grow too large.

  • Feed Spring bulbs while still in leaf, with tomato feed or sulphate of potash. Allow the leaves to turn yellow before cutting down as they contribute to making food for the bulb.

  • Carry on planting Summer bulbs e.g. Gladioli & Dahlias.

  • Plant out Dahlias around mid to the end of May and protect young shoots from Snails.

  • Pull up i.e. Myosotis (forget-me-nots) once flowered to stop them seeding all over the place.

  • Prune Spring flowering shrubs like Kerria japonica, which will benefit from the removal of roughly a third of the stems from the base, thus encouraging new growth.

  • Clematis can be a bit unruly at the moment with all the new growth, so tie in.

  • Be vigilant for pests like aphids, Vine weevils, Lily and Viburnum beetles.

  • When it comes to mowing the lawn, little and often is the way to go.

  • Continue to remove blanket weed from ponds.

Fabian Lee, Mapesbury Professional Gardener & Horticultural Specialist. fabianlee001@gmail.com

 

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