Sarah Jane Humphrey grew up in rural Cambridgeshire. After obtaining a BA (Hons) in Scientific and Natural History Illustration, she went on to study Illustration at Falmouth University.

At the age of 21 her first book was published in New York, and she has undertaken commissions for clients such as the Body Shop, McGraw Hill and the Eden Project. In 2016 she was awarded an RHS Silver Medal for her botanical illustrations. She lives in Falmouth.

She has led workshops in Watercolour Botanical Illustration at Truro Arts Company (2018).