Which walnut (akhrot) variety is best for the hills and does it need cross pollination?

For commercial walnut in the temperate hills, plant grafted named varieties rather than seedling akhrot, because grafts bear earlier, come true to type and give uniform thin shelled kernels that fetch better rates, while seedling trees are slow and variable. Several improved walnut varieties are recommended by the regional horticulture research stations and the central temperate institute, chosen for kernel quality and bearing. Walnut generally benefits from cross pollination, and the male and female flowers on a tree often do not open at the same time, so planting a mix of compatible varieties or pollinizers improves nut set. Confirm the currently recommended grafted varieties and the right pollinizer combination for your altitude with SKUAST or the temperate horticulture research station, and buy grafts from a certified nursery to avoid mislabelled plants.