How many years to bearing and what pollination does hazelnut need?

Hazelnut typically takes several years to start bearing, often around 4 to 6 years for first nuts and longer for full yield, and it generally needs cross pollination, so you must plant compatible pollinizer varieties together rather than a single type alone. Wind carries the pollen, so layout matters. Since India lacks a proven commercial hazelnut sector, matched pollinizer combinations and tested local recommendations are hard to get. Only attempt it in a genuinely suitable cold climate, source named compatible varieties from a recognised temperate research nursery, and treat the early years as non earning. Verify variety choice, pollination pairing and spacing with a temperate horticulture institute before planting.