Oak Summit Nursery
Black Ice Plum Tree
Black Ice Plum Tree
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Black Ice is a cold hardy Wisconsin plum with Western Sand Cherry ancestry. It produces large, deep purple fruit with a blue bloom and vibrant red flesh. At Oak Summit Nursery, fruit on young grafts ripened in the second half of August, one to two weeks before local wild plums and earlier than Toka. The fruit is sweet and juicy with a gentle tart edge.
These plants are propagated on their own roots rather than grafted. Black Ice is commonly sold grafted, but its sand cherry ancestry makes own root culture a useful trial for prairie conditions.
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![Black Ice Plum at Oak Summit Nursery [oak-release-20260829:IMG_2165.jpg]](http://oaksummitnursery.ca/cdn/shop/files/IMG_2165.jpg?v=1788019237&width=1445)
Growing details
- Hardiness
- Zone 3Oak Summit nursery rating
- Flavour
- Fruity, sweet plum flavour with aromatic character
- Site and soil
- A sunny site protected from harsh wind, with freely draining soil. Avoid standing water and frost pockets; premature spring warming beside a south wall can increase blossom-frost exposure.Crop guidance; local conditions can vary
- Mature size
- Black Ice is naturally relatively compact; the Minnesota cultivar reference gives a height up to about 3 mPublished reference; local expression can vary
- Fruit
- Large, deep purple plums with red flesh and sweet, juicy flavour. The nursery’s second-half-of-August ripening observation is retained as local evidence; these plants are on their own roots.From the reviewed product description
Ripening
At Oak Summit Nursery, fruit on young grafts ripened in the second half of August, one to two weeks before local wild plums and earlier than Toka
Existing English product description; timing varies with season and site
Cold hardinessZone 3 · Canadian maps for this plant
Zone 3 and warmer
The map shows minimum winter hardiness. Soil, moisture and summer warmth also affect how a plant grows.
About these maps
Climate: Natural Resources Canada, 1991–2020. Provincial distribution: VASCAN via retained botanical research. Province outlines: Natural Earth, public domain.
Open Government Licence – Canada