Polly O is a vigorous, highly productive filbert cultivar released by Oregon State University in 2018, representing a modern breakthrough for home and commercial growers in temperate regions. Hardy in zones 5 through 9, this tree thrives in full sun to partial shade and adapts well to maritime climates. What truly sets it apart is its role as part of a compatible pollination trio: plant Polly O alongside Wepster and McDonald, and you'll harvest abundant nuts suited for fresh eating, baking, or chocolate-covered indulgence. Unlike older filbert varieties, Polly O pairs excellent vigor with reliable productivity, making it the strongest performer among its cross-pollinating partners.
Partial Sun
Moderate
5-7
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Moderate
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As the most vigorous member of OSU's 2018 filbert release, Polly O delivers exceptional nut yields when paired with compatible pollinators like Wepster or McDonald. The nuts crack cleanly for eating fresh or incorporate seamlessly into baked goods and confections. Its suitability for maritime climates and frost-hardy nature across zones 5 to 9 mean coastal and northern gardeners can finally grow filberts with confidence. This variety represents a significant leap forward in filbert breeding, solving the pollination puzzle that has long frustrated home growers.
Polly O nuts are bred specifically for multiple uses, excelling whether cracked fresh for immediate eating, ground into filbert flour for baking, or roasted and dipped in chocolate. The nuts crack cleanly, which matters more than it sounds to anyone who has wrestled with stubborn shell fragments. Home bakers prize filberts for their rich, buttery flavor in cookies, cakes, and pralines, while fresh eating remains a simple pleasure when you have a productive tree on your property.
No timeline data available yet for this variety.
Filbert nuts germinate between 35 and 65 degrees Fahrenheit. Direct sow in fall or stratified seed in early spring, planting at a depth appropriate to nut size, typically about 1 inch deep.
Filbert nuts mature in late summer and early fall, corresponding with Polly O's August through September bloom timing. Harvest nuts when the husk begins to split naturally and nuts drop to the ground; they're ready when they separate cleanly from the husk. Collect fallen nuts regularly to prevent spoilage and pests. Allow harvested nuts to dry for several weeks before cracking.
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“Polly O emerged from Oregon State University's filbert breeding program as a 2018 release, marking a pivotal moment in making filbert cultivation accessible to broader regions. The OSU program deliberately created this variety as part of a compatible pollination system, addressing one of the oldest challenges in hazelnut growing. Rather than requiring gardeners to source rare or distant pollinators, Polly O was engineered to work reliably with Wepster and McDonald, all three developed in concert. This represents modern horticultural breeding at its most practical: solving real problems that prevented home gardeners from successfully growing nuts.”