Large Filbert is a robust, suckering deciduous shrub native to southeastern Europe and western Asia that grows 12 to 15 feet tall and equally wide. Hardy in zones 4 through 8, this giant hazel brings both ornamental appeal and edible nuts to the garden, with sticky-hairy foliage and twigs that distinguish it from its close relative, the European filbert. It's a parent plant of the commercial hybrid filberts grown worldwide for their prized nuts, and while it tolerates a range of conditions, it truly thrives in full sun with organically rich, well-drained loam.
Partial Sun
Moderate
4-8
180in H x 180in W
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High
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Large Filbert's elongated involucre husks and somewhat tree-like form give it a distinctive appearance among hazels, while its low maintenance needs and tolerance for average soils make it forgiving in most gardens. The sticky-hairy foliage and twigs are an unusual tactile feature that makes this shrub recognizable even from a distance. It serves equally well as a tall hedge or in naturalized plantings, earning its keep as both a functional and visually interesting landscape element.
Large Filbert produces edible nuts that can be harvested and eaten fresh or roasted. Beyond its nut production, the shrub serves as an attractive hedge plant or naturalized element in woodland-style gardens, where its suckering habit and tall, spreading form create visual structure and seasonal interest. The sticky-hairy foliage provides textural contrast to smoother-leaved plants, making it valuable for layered landscape design.
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Harvest filbert nuts in late summer or early fall when the husks turn brown and begin to split naturally. The nuts are ready when they drop from the tree or can be easily separated from the husk. Collect fallen nuts promptly and remove the husk by hand or allow it to dry before processing. Cure the nuts in a warm, dry location for several weeks before storage to ensure proper hardening.
Prune Large Filbert in late winter or early spring to maintain its shape and remove any crossing or damaged branches. Regularly remove root suckers at their point of origin to prevent the shrub from spreading beyond its intended footprint, especially important in formal hedges or smaller garden spaces. Light shaping after flowering will maintain a neat appearance without removing the flowering shoots for the coming year.
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“Corylus maxima originated in southeastern Europe and western Asia, where it evolved as a larger, more vigorous cousin to the European filbert. Its significance in horticulture lies in its role as a parent plant in hybrid breeding programs; when crossed with Corylus avellana, it produced the commercial filbert hybrids that dominate the global nut market today. This parentage makes Large Filbert foundational to modern nut cultivation, though it remains valued in its own right for ornamental and nut production in home gardens and cooler climates.”