How to Grow Barcelona Hazelnut
Wikimedia Commons
Barcelona Hazelnut
Corylus avellana 'Barcelona'
shrubBarcelona is a premier European hazelnut cultivar renowned for producing large, high-quality nuts with excellent flavor. This deciduous shrub grows 12-15 feet tall and wide, making it suitable for both commercial and home orchards. It is a heavy producer when properly pollinated and has become the industry standard for hazelnut cultivation in temperate regions.
When should you plant Barcelona Hazelnut in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Barcelona Hazelnut timeline · Pittsburgh, PA (Zone 6b)
-
Plant Barcelona Hazelnut
Around Apr 17Near Pittsburgh's average last spring frost.
-
Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
-
Harvest Barcelona Hazelnut
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Barcelona Hazelnut dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 5-8, with excellent performance in zones 6-7
Sign up free to see if Barcelona Hazelnut grows in your zone — and get a personalized planting timeline.
Get my Barcelona Hazelnut timeline →Growth Stages
Establishment
1-2 yearsYoung shrub develops root system and branch framework; minimal flowering in first 1-2 years
Water regularly during first season. Prune to develop open vase structure with 3-5 main scaffolds. Mulch around base to retain moisture and regulate soil temperature.
Early Flowering & Pollination
6-8 weeksMale catkins appear in late winter (February-March); female flowers emerge in spring as small red stigmas. Cross-pollination is essential for nut set.
Ensure compatible pollinator variety is within 50-100 feet (pollen dispersed by wind). Hand-pollinate if needed by shaking branches of male catkins over female flowers. Monitor for inadequate pollination.
Nut Development
3-4 monthsFertilized flowers develop into nuts enclosed in leafy husks. Nuts enlarge throughout spring and summer, with kernels filling during June-July.
Maintain consistent soil moisture. Apply balanced fertilizer (10-10-10) in early spring. Monitor for pests and diseases. Thin crowded nut clusters if desired for larger individual nuts.
Maturation & Hull Splitting
4-6 weeksHusks turn brown and begin to split; nuts achieve full size and develop characteristic brown shell color. Nuts may drop within husks or as loose kernels.
Reduce irrigation to allow nuts to dry. Do not harvest prematurely; kernels must fully mature for best flavor and storage. Prepare for harvest by clearing ground under canopy.
Harvest & Post-Harvest
Ongoing through fallMature nuts drop to ground, ready for collection. Husks separate easily from nuts when fully ripe.
Collect nuts regularly to prevent ground damage and pest infestation. Clean and dry nuts to 10-12% moisture content before storage. Prune after harvest to maintain shape and remove dead wood.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
-
Remove infested nuts before they drop; apply spinosad or insecticides in late May-June when adults emerge; cultural control by collecting and destroying fallen nuts
-
Dormant oil sprays in late winter; prune out heavily infested buds; miticide applications if severe
-
Prune out infected branches 12 inches below visible symptoms; copper fungicide sprays in fall and early spring; ensure adequate air circulation
-
Remove and destroy infected branches immediately; prune entire tree if systemically infected; copper sulfate sprays during dormancy; improve air circulation
-
and
Netting or exclusion barriers; live trapping and relocation; remove alternative food sources; predator deterrents
Uses
Gourmet nut crop
CulinaryBarcelona hazelnuts are prized for their large size, excellent flavor, and versatility in cooking. They are used in nut butters, confections, baking, and as a table nut, and are particularly valued in European chocolate and pastry industries. [source]
Oil production
CulinaryHigh-quality hazelnut oil can be cold-pressed from Barcelona nuts for use in cooking, salad dressings, and specialty foods. The oil is rich in monounsaturated fats and has a distinctive, pleasant nutty flavor. [source]
Ornamental and landscape value
HouseholdBarcelona hazelnut provides year-round ornamental interest with attractive foliage, showy winter catkins, and an appealing branching structure. It can be used as a specimen shrub, hedge, or in mixed borders. [source]
Wildlife food source
WildlifeHazelnuts are an important food source for wildlife including squirrels, jays, deer, and other animals. The plant supports beneficial insects and provides habitat structure. [source]
Basketry and coppicing
CraftFlexible hazelnut branches have been traditionally used for basketry, wattle fencing, and coppiced wood products. Fresh branches can be woven while still pliable. [source]
Harvest Tips
Barcelona hazelnuts typically begin productive bearing at 3-4 years, reaching peak production at 8-10 years. Harvest begins in late August through October, depending on climate. Nuts are ready when husks split easily and drop to ground. Collect daily to prevent loss to wildlife and ground spoilage. Dry nuts thoroughly (to 10-12% moisture) in well-ventilated area for 2-3 weeks before storage. Store in cool, dry conditions (below 50°F, 60-70% humidity) for extended shelf life. Nuts can be stored for 1-2 years under proper conditions.
Fun Facts
- 🌱 Barcelona is the Spanish name for Barcelona, Spain, where this cultivar was selected and developed centuries ago. It remains the most widely planted hazelnut cultivar worldwide and is the primary commercial variety in the Pacific Northwest USA.
- 🌱 Hazelnut pollen is released in late winter (sometimes as early as January in mild climates), and the male catkins can produce enormous amounts of pollen—a single ament can contain over 4 million pollen grains. This is why hazelnuts are notorious allergens for sensitive individuals.
- 🌱 Barcelona hazelnuts require cross-pollination and are self-sterile, meaning a compatible pollenizer variety must be planted nearby. Gasaway is traditionally the best pollinator for Barcelona, and the two varieties are specifically bred to flower at slightly overlapping times to maximize pollination success.
Gardening Terms
New to gardening? Learn about terms used in this guide:
Join 30,000 gardeners planning their gardens with LizPlants.
Get your personalized Barcelona Hazelnut planting timeline
Tell us your zip code and we'll calculate exactly when to start Barcelona Hazelnut seeds, transplant seedlings, and harvest — based on your USDA zone and local frost dates. Includes calendar reminders and printable task lists. Free to start.
Get my Barcelona Hazelnut timeline →