Wallis's Wonder (Prunus domestica Wallis's Wonder) was first grown about 1960 by Eric Wallis at Heath Farm Bluntisham in the heart of Cambridgeshire. It was custom raised by Simpsons of Fordham by crossing a Severn Cross plum which originated in Somerset with a Victoria plum which originated in Sussex. It is still grown at Heath Farm.

It has a medium to large sized purple skinned fruit that ripens for picking in late September and, if put into cold storage, remains good for eating well into October. The flesh is sweet, soft and juicy - ideal for plum pie, plum treacle, plum pudding, chopped plums in fresh fruit salad and even plum wine.