Mammoth Raspberry is a vigorous, erect deciduous shrub renowned for producing very large, firm, bright red berries with excellent flavor, ideal for fresh eating, preserves, or freezing. The canes are thorny, upright, and robust, forming a clump of perennial roots with biennial stems. Flowers bloom in late spring to early summer, followed by fruiting in mid- to late summer. This variety is valued for high yields and large fruit size, making it a staple in home gardens and small-scale production.
- Size: Height: 4–6 ft (1.2–1.8 m). Spread: 3–4 ft (0.9–1.2 m). Habit: Upright, clumping, biennial canes
- Hardiness: Cold-hardy; tolerates Prairie winters
- Light: Full sun for best fruiting and cane strength
- Soil: Well-drained, fertile soil; prefers slightly acidic to neutral pH
- Water: Moderate; keep soil consistently moist during fruiting
- Pruning: Remove spent fruiting canes after harvest; thin remaining canes in early spring to maintain airflow and vigor
- Support: Trellising recommended for heavy fruit loads
- Maintenance: Moderate; mulch to conserve moisture and suppress weeds
- Pests & Wildlife: Birds may eat ripe fruit; watch for common raspberry pests such as aphids or cane borers