The North Star cherry tree is a cold-hardy, naturally dwarf (6–10 feet) tart cherry cultivar, perfect for small landscapes and zones 4-8, producing, large, bright red, sour cherries in late June. Introduced by the University of Minnesota in 1950, it is self-pollinating, disease-resistant, and thrives in full sun with well-drained soil. 
Key Characteristics & Care
Fruit: Sour/tart with red flesh, ideal for baking, pies, and jams.
Size: Compact, growing to 8–10 feet high and wide.
Pollination: Self-fertile; no other tree needed.
Hardiness: Excellent cold hardiness (USDA Zones 4-8).
Harvest: Late June.
Site Needs: Requires full sun (6-8+ hours) and well-drained soil; intolerant of standing water.
Maintenance: Low maintenance, but requires pruning in late winter/early spring to maintain shape. 
Pros and Cons
Pros: Compact size allows for easy harvesting and netting (for birds). Highly productive, often bearing fruit in its first year. Resistant to brown rot.
Cons: Susceptible to common cherry pests like aphids and fruit flies, as well as diseases like leaf spot and black knot. 
Usage
Due to its small stature, it is excellent for small yards, or as a focal point in a home orchard. The tree features attractive white blossoms in spring and dark green foliage.