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.
Check out our comprehensive A-Z of RHS advice
We offer expert advice on a wide range of garden features; see our A - Z directory.
Phalaenopsis (moth orchids) grow well in centrally heated rooms and have long-lasting flowers produced all year round. They are one of the most popular indoor orchids.
Pleaching is a method of training trees to produce a narrow screen or hedge by tying in and interlacing flexible young shoots along a supporting framework. Use this technique to make walks, arbours, tunnels and arches.
Poinsettias are cheery plants that are widely grown indoors over Christmas for their brightly coloured bracts. They are often disposed of once they start to fade, but with a little care, you can keep them all year and the bracts will colour up again the following year.
Algae can be a major problem in ponds, causing discoloured water, green scum at the pond edges, or dense mats of green growth under the surface. If conditions are favourable, algae will spread quickly and can harm aquatic life.
Ponds are a lovely addition to any garden and can provide a rich habitat for a range of wildlife. However, without care ponds can soon become an eyesore with overgrown plants, weeds and water that is unhealthy for fish and other wildlife. Occasional cleaning and regular maintenance are required.
There are a number of ways of creating a pond. Most involve excavating a hole of the required shape: what is different is the type of impervious material used to line the hole. These include flexible waterproof liners, semi-solid preformed ponds and concrete.
Pond filters are used to maintain a healthy pond by keeping it clear of algae and some of the debris which, in turn, helps to keep fish healthy.
Raised beds are a great way of growing a wide range of plants, and are particularly popular for growing fruit and vegetables. They are a good way of boosting drainage and can be used to introduce a different soil type to your garden. Raised beds are also a useful way to garden if you have restricted mobility, as they reduce the need to bend.
Red thread is one of the most common fungal patch diseases found on lawns, particularly where the turf is deficient in nitrogen. It causes brown patches of turf, especially during a wet summer.
If you live in a building without its own garden, establishing a roof or balcony garden is the ideal way to create your own mini horticultural haven, ensuring you don’t miss out on growing a wide range of plants.
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