The Threatened Plants Project (TPP)
The TPP is Plant Heritage's groundbreaking venture to red list cultivars in the UK.
The International Union for Conservation of Nature has been assessing the conservation status of wild species for more than four decades to pinpoint those that are threatened with extinction.
The TPP fulfils a similar role for cultivars in the UK, but goes a few steps further by assessing them for value and sourcing conservation plans. Identifying threatened plants enables Plant Heritage to use its resources where they are most needed.
Why conserve threatened plants?
The original need that led to the founding of Plant Heritage ‘to conserve the unique gene pool of cultivated plants’ not only remains but has been strengthened through the Aichi Biodiversity Target 13 (2011).
This target for the first time recognises, in an international treaty, the value of domesticated plants and animals, acknowledging species with socio-economic and cultural value. The developing challenges posed by climate change, and the growing role of horticulture in the health and well-being agenda in the context of an increasingly urbanised society also emphasises the essential value of cultivated plant diversity to all our futures.
You can find out more about why plant conversation is so important on the Plant Heritage website.
What is a Threatened Plant?
You can find a draft list of threatened cultivars grown in gardens in the UK & Ireland on the Plant Heritage website, which was drawn up as a result of assessing approximately one third of the genera in cultivation in the UK. It is continually being rechecked and updated, with additional revisions published as they become available.
How can you help?
If you would like to volunteer to help investigate rare cultivars please contact us.