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Things to do in your Mapesbury garden in August:

  • Cut back foliage and stems of herbaceous plants that have died back.

  • Dead head i.e. Dahlias, Penstemons and Roses to prolong flowering, otherwise plantís energy will go into seed production.

  • Cutting back hardy geraniums a little will stimulate new growth.

  • Once flowers have finished on climbing/rambling roses that do not flower again/produce attractive hips, they can be pruned.

  • Apply liquid tomato feed weekly to prolong flowering of perennial and container plants.

  • Keep water topped up in ponds and remove blanket/duck weed and plant debris.

  • Prune Wisteria and shrubs i.e. Pyracantha, after flowering.

  • Lightly prune Lavenders and Hebes after flowering.

  • Monitor plants for signs of wilting during dry spells and water thoroughly. Keeping i.e. Camellias and Rhododendrons well watered now will help them flower well next year.

  • Cut lawn once a week, raising the mower blades during dry spells to reduce drought stress.

  • Prune ornamental trees i.e. flowering cherries now, while there is less disease around to infect the wounds and to give these wounds time to heal before winter.

  • Remove damaged and diseased branches, weak growth and unwanted stems growing from the base of the tree. Where stems and branches cross or rub against each other, remove the weakest to prevent possible infection.

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