Ontario plum was raised by Ellwanger and Barry, Rochester, New York, USA and first described 1874.
Was grown commercially in the UK and elsewhere in Europe.
Medium large, round-oval fruit. Greenish yellow, bloomy skin giving the appearance of a very large
greengage. Soft golden yellow flesh. Sometime a little fiberous. Good flavour as a dessert variety.
Bruises easily.
Upright, spreading tree. Hardy and self-fertile Fair cropping. Susceptible to bacterial canker and
brown rot but resistant to plum rust