Hazelnuts, commonly named Filberts are a multi-branched tree growing 5 to 15 feet tall. The plants have high vigor growing up to 24 to 36 inches per year until the tree is mature. In the early to middle spring, the cylindrical catkins grow 2 to 4 inches in length grow on the 2nd year stems to successfully pollinate the flowers with the help of wind.
The nuts are ripe when the outer husk becomes brown. The nuts are sweet and can be eaten fresh, roasted, or cooked. The trees make a welcomed habitat for small to large birds and other small animals. The seasonal colors of the trees are always interesting with gray brown branches during winter, olive green foliage during summer, and yellow, oranges, red and purple in the autumn. Plants can be successfully grown in USDA zones 4 to 7.