Help us achieve our goals:
make a donation »
Join the RHS today and
support our charity
Free personalised gardening advice
RHS members get reduced ticket prices
RHS members get free access to RHS Gardens
Reduced prices on RHS Garden courses and workshops
020 3176 5800
Mon – Fri | 9am – 5pm
Make a donation
Join the RHS today and support our charity
I have forgotten my password
Keep me signed in
Register for free to receive our newsletters, add comments to blogs/articles and to save content.
Browse all our advice on plant problems
Search our A - Z directory to find out expert advice on all your plant problems.
Western red cedar (Thuja plicata) is a popular conifer, grown most commonly as hedging. Unfortunately, it can sometimes be attacked by Thuja blight, an unsightly disease of the foliage that can cause loss of vigour, particularly on young trees.
There is no standard definition for a toadstool, and no clear distinction between toadstools and mushrooms. Both terms refer to the fruiting bodies produced by fungi. Most of these fungi are harmless or even beneficial to plants, but there are a few that can cause disease problems, such as honey fungus and the fairy ring fungi.
Leaf mould can develop rapidly to cause significant yield loss in greenhouse-grown tomatoes. It is rarely seen on outdoor crops.
Many viruses affect tomatoes causing mosaic patterns on leaves, leaf distortions, stunted growth, bronzing or marbling patterns on the fruit.
Although easy to grow and very rewarding, tomatoes can suffer from a range of easily preventable problems at the time of ripening.
Although easy to grow, tomato fruits can suffer from splitting and cracking in late summer. This is difficult to prevent, as it is caused by fluctuating temperatures and water supply - which are often out of the control of the gardener.
Although easy to grow and very rewarding, tomatoes can suffer from a range of easily preventable leaf problems.
Although easy to grow and very rewarding, tomatoes can suffer from a range of problems with their stems, from the lumps and bumps of root initials to more serious stem rots caused by a variety of diseases.
These moth caterpillars bind leaves together with silky threads and feed inside. They can affect a range of plants and in a glasshouse can cause damage throughout the year.
With its scented jasmine-like flowers, Trachelospermum is often known as star jasmine. Its evergreen foliage makes it an excellent climber for a sunny, sheltered spot in mild regions of the UK. Elsewhere, it can be grown under cover of a greenhouse or conservatory.
We're a UK charity established to share the best in gardening. We want to enrich everyone's life through plants, and make the UK a greener and more beautiful place.
Join the RHS today and get 12 months for the price of 9