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fuchsia rust

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  • To look their best, meadows need careful maintenance. Credit: RHS/Tim Sandall.

    Wildflower meadow: maintenance

    Wildflower meadows require an annual maintenance programme to allow the more desirable species to flourish and to reduce the vigour of the more rampant species. This usually involves mowing and some judicious weed control.

  • Willow anthracnose, scab and canker

    Willow anthracnose, scab and canker

    Three important diseases of willows in the UK are anthracnose, scab and black canker. They harm the trees and can make them unsightly.

  • ©RHS_SCN0005172

    Willow leaf beetles

    The feeding activities of bronzy green or bluish black beetles and their black larvae can cause foliage of willows, aspen and poplars to dry up and turn brown.

  • Wind scorch

    Wind scorch

    In winter, evergreen plants are prone to wind scorch (also known as leaf scorch). This is caused by cold winds and poor soil conditions resulting in scorched, brown, dry leaves.

  • Winter moth caterpillar and leaf damage to cherry leaves. Image: RHS, Horticultural Science

    Winter moth caterpillars

    Winter moth caterpillars can be responsible for eating holes in the leaves of many deciduous trees and shrubs during spring.

  • ©RHS SCN0006343


    Wireworms are the larvae of click beetles. They live in the soil and feed on plant roots, they usually only cause problems when grassy areas are converted to vegetable beds.

  • Wisteria


    Wisterias are beautiful twining climbers with beautifully scented flowers in shades of white, blue, purple and pink. Wisteria is ideal for training into trees and covering walls, pergolas and other garden structures.

  • © RHS / Mike Sleigh (RHS_PUB0018105)

    Wisteria problems: frequently asked questions

    Wisteria is one of the quintessential cottage garden plants, with a chocolate-box image of spectacular blooms adorning the front of a country cottage. It is actually a very versatile plant and lends itself to a variety of situations, including growth in containers. Of the few problems affecting the plant, non-flowering and sudden dieback are probably the most frustrating.

    Here we give answers to many of the common problems encountered. They are grouped by the area of the plant affected: shoots; leaves and flowers.

  • Wisteria scale (Eulecanium exrescens). Credit: RHS/Entomology.

    Wisteria scale

    Wisteria scale is a sap sucking insect that was first found in the UK in a London garden in 2001. Since then it has spread but remains mainly a problem in London and the surrounding areas.

  • Withdrawn chemicals

    Withdrawn chemicals

    Occasionally chemicals available to gardeners are withdrawn from sale or use. It is good practise to check in the shed on a regular basis to ensure such products are disposed of safely.

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