Jam Session™ European Plum
A Cornell University release, Jam Session™ is the perfect plum for turning into jams, sauces and chutneys. It is freestone and produces abundant crops of Damson-like blue fruits with yellow flesh.
Latin Name: Prunus x domestica
Site and Soil: Plums like 1/2 day to full sun and well-drained soil.
Rootstock Description: A semi-dwarf rootstock for Plums and other stone fruits, Marianna produces trees 12’-15’ in height or less.
Pollination Requirements: Not self-fertile. Plant with another early European variety for best crops.
Hardiness: Hardy to minus 30°F.
Bearing Age: 2-3 years after planting
Size at Maturity: 10-12 ft. in height.
Fruit Skin: Purple/Blue
Fruit Flesh: Yellow
Bloom Time: Early April
Ripening Time: Late August
Yield: 50+ lbs.
Pests & Diseases: Our plums are not bothered by pests. Bacterial Canker can occasionally damage trunks or branches. Symptoms of this disease are exudations of amber-colored sap. Spraying lime-sulfur or copper in the fall and early spring can help control Bacterial Canker. This tree can be susceptible to the fungal diseases brown rot & black knot. Early mid bloom-time.
USDA Zone: 5-9