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We have combined these two powerful search tools into a single Find a Plant service searching over 250,000 plant records.
Virtually all of the features of the old searches are still available and in addition we have added several new features to create a more comprehensive and user friendly search experience.
When using this search
Search by plant name, key attributes or both to find plant details and a list of
AGM plants have been through a rigorous trial and assessment programme. They are:
© RHS 1989
the RHS today and get 12 months for the price of 9
Other common names
yellow skunk cabbage American skunk cabbage
western skunk cabbage
Lysichiton are rhizomatous herbaceous perennials with large, lance-shaped leaves developing after the ovate white or yellow flower spathes surrounding the club-like, yellow or green flowering spadix
L. americanus is a robust herbaceous perennial with unpleasantly-scented, bright yellow arum-like flowers 40cm in height in early spring, followed by rich green oval leaves up to 1.2m in length
West N America
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
Aspect South-facing or West-facing or East-facing
Exposure Sheltered or Exposed
pHNeutral, Acid, Alkaline
Time to ultimate height
From March 2016 The EU Regulation on Invasive Alien Species will prohibit the sale and exchange of this species. Gardeners who already have it in their gardens must ensure it does not spread further. Thrives in fertile, humus-rich soil at pool margins, in full sun or partial shade
See cultivation note above
Suggested planting locations and garden types
Pruning No pruning required
Pests Generally pest free
Generally disease free
RHS members can get exclusive individual advice from the RHS Gardening Advice team.
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.
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Join the RHS today and get 12 months for the price of 9