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.
See what events are on near you and browse your bookmarked pages.
Browse all our advice on plant problems
Search our A - Z directory to find out expert advice on all your plant problems.
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.
Any tree or shrub will suffer some degree of stress when uprooted. The shock of transplanting or moving can be lessened if the task is carried out correctly.
Tree rusts are fungal diseases causing dusty orange, brown or black spots (pustules) on the leaves of poplar, willow, birch and plum, and cankers on the stems and branches of five-needled pine.
It can be frustrating when trees and shrubs fail to establish well. The main symptoms of poor establishment are yellow or brown leaves and shoots dying back. There are steps you can take to remedy the situation, but it is better to try and prevent these problems happening in the first place.
Many trees, shrubs and woody climbers can send up suckers from their roots which, if left, will turn into another plant. Tree and shrub seedlings may also be a nuisance, as they are often numerous and can quickly spread, becoming deep-rooted.
Scab diseases of trees and shrubs can disfigure the plant by producing unsightly dark spots on the leaves. Blossoms and fruit can also be attacked and the vigour of the plant reduced as a result of premature defoliation.
When trees are felled or fall, their stumps should be removed to prevent suckering and fungal root rots. Although often large and heavy, stumps can be removed with the right equipment and technique, or removed by weedkiller.
Trilliums, also known as wake robin, are spring-flowering perennials with three petals sitting atop three leaves, much like a cup on a saucer. They are slow to establish but are then long lived. Like peonies they are best planted and left to establish over a number of years.
Tulip fire is a fungal disease of tulips caused by Botrytis tulipae, which produces brown spots and twisted, withered and distorted leaves. It is so named because plants appear scorched by fire.
Many viruses affect tulips, causing streaked flowers, mottled leaves, distorted plants and stunted growth.
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