• AGM plants

    AGM plants have been through a rigorous trial and assessment programme. They are:

    • Excellent for ordinary use in appropriate conditions
    • Available to buy
    • Of good constitution
    • Essentially stable in form & colour
    • Reasonably resistant to pests & diseases


CrocusSince 1992 the Crocus collection at RHS Garden Wisley has developed from the large collection of bulbous and bulb-like plants that has long been a feature of the Rock Garden and Alpine Houses here. This collection now exceeds 800 accessions, representing more than 100 species and subspecific taxa, and 96 cultivars, the latter including plantings in other parts of the garden.

As the collection has become rather large, a degree of rationalisation is being considered. Links are maintained with many other institutions and nurseries, with regular exchanges of material of mutual benefit.

Plants from the collection are displayed in the Alpine House each autumn and spring, creating a fine spectacle for visitors.

The entire collection is catalogued in the RHS Horticultural Database. The Surrey Group of the NCCPG has assisted in the preparation of specimens for the RHS Herbarium at Wisley, and steady progress is being made in creating a photographic record of the collection.

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The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.