Best raspberry cultivars for the Middle Belt with high sugar contentChoosing raspberry cultivars for the temperate climates of the Middle Belt requires a focus on fruit density and sugar accumulation, as excess moisture and limited sunlight often lead to sour, small berries. It produces dark red berries weighing up to 10 grams (0.35 oz). Compact and High-Sugar CultivarsThe Polka variety is recognized for its compactness and structural strength. For those prioritizing taste and immunity, the Swiss-bred Zugana is a dessert variety with high sugar content. Its bright red berries weigh about 8 grams (0.28 oz).