Devon Imp (May) Devon Imp (August) Devon Imp (September) Devon Imp Small and downy. £3.50 A small plant from this respected British breeder, 'Devon Imp' is still relatively rare but it's a lovely wee thing. Green with dark tips in spring becoming brighter green through summer. Compact, as you would expect from the name. Sue Thomas (Rowe) (GB) 2003 Sent in 9cm pots as growing, established plants.