Trials are normally grown from plants (as opposed to seed, unless the plants are propagated mainly from seed; this is indicated in the list) submitted by nurserymen, individuals, breeders etc (the senders to trial) and are open to visitors to RHS Garden Wisley except for those grown in restricted areas.
Find out about the plants undergoing trials in 2009
Trials bulletins
The results of major trials are now being produced in full colour bulletins.
View, download or find out how to order one of the RHS Plant Trials Bulletins.
RHS Horticultural database
Trials also provide an important spur for RHS research into cultivated plants and their names, use this database to search a comprehensive index of garden plant names.
View the RHS Horticultural database
RHS Herbarium
Trials are an important source of material for the RHS Herbarium located at Wisley.