Hazelnuts (Corylus spp.) Hazelnuts are currently attracting lots of attention and for good reason. But even without considering the possible confectionery or snack market, this versatile shrubby tree offers multiple possibilities. Since the kernels are high in both oil and protein, they could potentially replace soybeans. Recent research indicates that hazelnuts produced the most oil per acre of any perennial plant. Even hazelnut shells can be used as fuel as they have almost twice the BTU as wood. Hazelnut Varieties (Layers) Hazelnuts are propagated by layering, much like black raspberries. For commercial settings they offer the advantage of genetically-identical trees for predictable ripening and consistent superior nut quality. Bareroot plants