KTUM-ZHUM is a late-winter quince variety of folk selection from Southern Dagestan, widely distributed in the region and adapted for the North Caucasus region. The tree is characterized by vigorous growth: the young crown is narrow-cylindrical, while the fruit-bearing crown is broadly round. Fruits of medium and large size (average weight 250–350 g, up to 800 g) have a high-cylindrical or elliptical shape with a ribbed smooth skin of golden-yellow color. The flesh is light yellow, juicy, and sour-sweet; taste quality is considered above average due to sugar content (≈9 %) and vitamin C (23.1 mg/100 g). Fruits retain freshness until spring, and under ordinary storage conditions can remain suitable for consumption for longer.
The variety begins fruiting in the 5th–6th year after planting and ensures an annual yield. The harvest period falls in late September–early October; fruits reach consumer maturity one month after picking, which allows them to be stored until February with proper handling. Yield ranges from 25 to 30 tons/hectare. KTUM-ZHUM is resistant to fungal diseases and pests, though it may be susceptible to damage by codling moth.
Fruits of this variety are suitable for both direct fresh consumption and making compotes, jams, purees, marmalade, or baked goods. Thanks to their juiciness and moderate acidity, they easily turn into aromatic desserts and drinks. Propagation is done via layering, root suckers, and grafting (bud grafting), ensuring stable retention of variety characteristics.
