Acer campestre 'William Caldwell'
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| Acer campestre 'William Caldwell' A.G.M. | |
|---|---|
| Species | Acer campestre |
| Cultivar | 'William Caldwell' |
| Origin | Caldwell 9& Sons Limited.The Nurseries. Knutsford. Cheshire. England |
The Field Maple cultivar Acer campestre 'William Caldwell' was cloned from a seedling discovered at Caldwell's Ollerton Nursery near Knutsford, England, on 16 September 1976 by Donovan Caldwell Leaman, Director of the Caldwell's Nurseries that closed on 31 January 1992, after 212 years in Knutsford. The tree was released to commerce in 1986 R.H.S. Award of Garden Merit. (AGM) November 2022, forty-nine years after the seed was sown.
The tree is noted for its fastigiate shape, and foliage which turns orange or red in autumn where planted on acid soils, not yellow as with the species.[1]
Cultivation
'William Caldwell' is now listed in several Dutch Nurseries. The tree is also to be found in France, Germany, the Czech Republic, Hungary and Poland. The "BILL" Maple was introduced in 2012 to the United States by the United States Department of Agriculture to their National Arboretum in Washington DC. Having cleared the Quarantine Laboratory, the Caldwell Maple is now being grown by Schmidts' Nurseries in Oregon where its remarkable clean growth when compared to their other Field Maples is cause for celebration.[2] Schmidts expect to put the cultivar into the U.S. nursery trade in 2025
