Prunus ‘Crimson Passion’ Crimson Passion Cherry is a cold-hardy, dwarf sour cherry variety that produces large, dark red, sweet-tart cherries. Unlike other dwarf sour cherries, it has a higher sugar content, making it ideal for fresh eating, baking, and preserves. It is self-pollinating and thrives in prairie climates (Zone 2-3), making it an excellent choice for Southwest Saskatchewan. Planting & Location Hardiness Zone: 2-7 (cold-hardy and drought-resistant) Mature Size: 6-8 feet tall, 5-7 feet wide Growth Rate: Moderate (12-18 inches per year) Sunlight Needs: Full sun (at least 6 hours per day for best fruiting) Soil Preference: Prefers well-drained, loamy soil. Tolerates sandy and clay soils if well-draining. Performs best in slightly acidic to neutral soil (pH 6.0-7.0). Spacing: 5-7 feet apart for optimal air circulation and fruit production. Watering Young Trees (First 2 Years): Water deeply once per week to establish roots. Established Trees: Drought-tolerant; water every 2-3 weeks in dry periods. Avoid Overwatering: Does not tolerate soggy soil—ensure good drainage. Fertilizing First Year: No fertilizer needed—focus on root establishment. Mature Trees: Apply a balanced slow-release fertilizer (e.g., 10-10-10) in early spring. Organic alternative: Compost or well-rotted manure in spring. Avoid excessive nitrogen, which encourages leafy growth over fruiting. Pollination & Fruit Production Self-Pollinating: Does not require another cherry tree to set fruit. Fruit Size: Large, 4-5g cherries, sweeter than other dwarf sour cherries. Harvest Time: Mid to late July (depending on the season). Yield: 15-20 lbs per tree when mature. Pruning & Maintenance Best Time to Prune: Late winter to early spring, before new growth. How to Prune: Remove dead, diseased, or crossing branches to improve airflow. Maintain an open center or vase shape for better sun exposure. Minimal pruning required compared to other cherry varieties. Pest & Disease Management Common Pests: Aphids – Sap-sucking insects that cause curled leaves. Solution: Spray with insecticidal soap or introduce ladybugs. Cherry Fruit Fly – Lays eggs inside cherries, causing maggots. Solution: Use sticky traps and pick up fallen fruit. Birds – Love ripe cherries! Solution: Use netting to protect ripening fruit. Common Diseases: Brown Rot – Fungal disease causing rotted fruit. Solution: Remove infected fruit and apply fungicide if needed. Powdery Mildew – White fungal growth on leaves. Solution: Improve airflow and apply sulfur-based fungicides. Canker (Bacterial or Fungal) – Causes sunken lesions on branches. Solution: Prune out infected branches and apply copper spray. Winter Protection Young Trees: Protect with burlap or tree wraps in extreme cold or exposed areas. Mulching: Apply 2-4 inches of mulch around the base (not touching the trunk) to insulate roots. Rodents & Rabbits: Use tree guards to prevent bark damage in winter. Landscape Uses Perfect for small yards & urban gardensGreat for fresh eating, baking, and preservesSelf-pollinating—no second tree neededCold-hardy & drought-resistant once establishedAttracts pollinators and provides seasonal interest Additional Notes: Crimson Passion Cherry is part of the University of Saskatchewan’s dwarf sour cherry breeding program, making it highly adapted to prairie climates. Lifespan: 20-30 years with proper care. Works well in hedgerows, container plantings, and mixed fruit orchards. Photo courtesy of Jeffries Nurseries
