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About the Clark Filbert Hazelnut Tree

The Clark Filbert Hazelnut Tree stands as a testament to resilience and quality, boasting excellent nuts and remarkable blight resistance. Developed by Oregon State University, this European hazelnut selection is a compact marvel, perfect for both orchards and home gardens.

The nuts produced by the Clark Filbert Hazelnut Tree are prized for their excellent quality and versatility. Rich in unsaturated fats, magnesium, calcium, and vitamins B and E, hazelnuts are not only delicious but also offer numerous health benefits. Whether enjoyed fresh, roasted, or incorporated into recipes, these flavorful nuts are a delightful addition to a variety of dishes, from salads and baked goods to sauces and spreads.

Growing the Clark Filbert Hazelnut Tree

Growing the Clark Filbert Hazelnut Tree is suitable for both large-scale orchards and backyard gardens. With its compact size and upright growth habit, reaching approximately 12-15 feet tall, this hazelnut tree thrives in full sun and well-drained soil.

A major strength of this cultivar is its quantitative resistance to eastern filbert blight. Its resistance is similar to ‘Lewis.’ Pollinate with another hazelnut to ensure a fruitful harvest and enjoy the bountiful yield of this remarkable tree. As the names imply, ‘Lewis’ and 'Clark make great companions. See recommendations below.

Ensure optimal nut production by providing proper care and attention to enjoy the flavorful bounty harvested from this resilient and versatile tree.

Prunus 'Clark'

Survival Guaranteed!

Since 1816, Stark Bro’s has promised to provide customers with the very best fruit trees and plants. It’s just that simple. If your trees or plants do not survive, please let us know within one year of delivery. We will send you a free one-time replacement, with a nominal shipping fee of $9.99. If the item in question is not available, we can issue a one-time credit to your account equaling the original product purchase price or issue you a refund. Read more about our warranty policy.


Bloom Time Late
Fruit Color Brown
Fruit Size Medium - Large
Shade/Sun Full Sun
Soil Moisture Well Drained
Soil pH Level 5.5 - 7.0
Zone Range 5 - 8

Size & Spacing

Mature Size

When your tree matures, it will be approximately 15 - 20' tall x 15 - 20' wide.

Recommended Spacing

We recommend spacing these trees 15 - 20' apart to ensure room for growth.

Zone Compatibility

This Variety's Zone Range 5 - 8
My Hardiness Zone ?
The USDA hardiness zones offer a guide to varieties that will grow well in certain climates. Each zone corresponds to the minimum winter temperatures experienced in a given area. Make sure that your hardiness zone lies within the zone compatibility range of this variety before ordering.


This variety requires another one for adequate pollination.

Cross-pollination by a different variety is key to its growing and bearing success. Plant one of these varieties within 100' for best pollination.

Tools & Supplies

Having the proper tools and supplies when growing your own can make the difference between a good harvest and a great harvest! Here's a list that our experts recommend for this variety.

Planting & Care

Learn all about how to grow filbert hazelnut trees in The Growing Guide. An entire section of our website dedicated to your growing success.

Shipping Information

Arrives when it's time to plant

Your success is our priority. We work hard to make sure that your order arrives at the ideal time for planting in your location based on your local climate conditions.


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