Click here for Filbert Care Guide Corylus avellana – Jefferson Filbert (Hazelnut) Due to import regulations, we are unable to ship Filberts (Hazelnuts) to CA, OR. Jefferson is the leading filbert variety, replacing Barcelona as the most widely grown hazelnut in the U.S. Unlike Barcelona, Jefferson is resistant to Eastern Filbert Blight (EFB) and produces high yields of attractive nuts on an easily managed, upright shrub. Pollination: Requires a pollinizer. Pollinated by Eta (20%), Felix (20%), and Theta (60%), all of which are also EFB-resistant and ensure excellent nut set. Flowering: Blooms too late to be pollinated by other varieties. Introduction: Developed by Oregon State University. Growth: Plants are grown on their own roots. Size & Spacing: 15' tall, spaced 8-10' apart in a circular pattern. Growing Zones: 5-8. Plant Characteristics Pest Resistance: Very Good Disease Resistance: Excellent Drought Tolerance: Good Heat Tolerance: Very Good Humidity Tolerance: Very Good Sun Tolerance: Very Good Wet Soil Tolerance: Fair Shade Tolerance: Fair No-Spray Viability: Excellent Salt Tolerance: Poor Kid-Friendly (Fresh Eating): Excellent Deer Resistance: Fair Thorns: No Plant Type: Shrub Soil Type: Adaptable Edible Type: Nut Self-Fertile: No This information is accurate to the best of our knowledge. Comments and opinions are always welcome.