Will Alfred Theodore Ingwersen (7 May 1905 – 14 June 1990), was a British nurseryman and alpine specialist.
[1][2] He was an authority on alpine plants, and an expert on rock gardens.
[3] Ingwersen was awarded numerous gold medals at the Chelsea Flower Show and was the author or co-author of several books.
On occasion, he served as a broadcaster on the BBC's Gardeners' Question Time.
The nursery founded by his father ceased to trade in November 2008 when his half-brother Paul retired.