- Pinch out side shoots on cordon tomatoes
- Harvest lettuces
- Position summer hanging baskets and containers outside
- Plant out summer bedding and use it to fill gaps in the herbaceous border or to fill your tubs
- Plant out cannas and dahlias once danger of frost has passed.
- Cut back dead bulb foliage if not done already. It is important to wait until the foliage dies down naturally, as cutting back too early can lead to blindness next year.
- Cut back and deadhead Oriental poppies after flowering. Cutting them right back to ground level will stimulate growth of fresh new foliage, and perhaps even some new blooms.
- Euphorbias look a lot better if spent flowers are removed, cutting the flowered stem back to ground level. *Wear gloves when working with Euphorbias as some people can develop a mild rash when exposed to Euphorbia sap and roots.*
- Tackle bindweed when it appears in a border.
- Provide support for tall perennials and sweet peas
- Continue to protect lily, delphiniums, hostas and other susceptible plants from slugs and snails.
- Cut back tender shrubs such as Penstemon, Caryopteris and hardy fuchsias after danger of frosts has past.
- Clip evergreen hedges such as privet (Ligustrum), box (Buxus) andLonicera nitida if needed.
- Thin out new shoots on trees and shrubs that were pruned in winter to stimulate growth. Remove crossing stems and prevent overcrowding of new growth.
- Prune flowering shrubs such as Deutzia, Kolkwitzia, Weigela andPhiladelphus after they have finished flowering.
- Evergreens such as Viburnum tinus can also still be trimmed this month.
- Prune deciduous magnolias once the plant is in full leaf.
- Rhododendrons can be lightly pruned after flowering. More severe pruning should wait until the following early spring.
- Hybrid tea roses can be disbudded, removing all smaller buds from the cluster that forms at the shoot tip, leaving the largest central (or ‘king’) bud to develop into a large, show-stopping bloom.
- Sprinkle bonemeal fertiliser around perennials, shrubs and roses
- Water around the crown of tree ferns, especially newly planted ones.
