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Over the last century, many advances were made for filbert nut improvement for quality nuts for the eastern US. Eta is a 2009 introduction that is immune to Eastern Filbert Blight and is a late pollen shedding cultivar that pollinates Theta and Jefferson. Zone 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	Good
No Spray	Very Good
Salt Tolerance	Poor
Fun for Kids	Very Good
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/opinions are always welcome

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Filbert in the winter

Filberts also called hazelnuts or hazels, filberts are deciduous shrubs 6' to 30' which produce small nuts in the fall. They grow best in zones 8 and 9 in the Northwest, but to well in 6 and 7 pretty much throughout the country. Self-unfruitful; plant at least two varieties.

Culture
Plant filberts in a spot protected from bitter winter winds. The plants do not have tap roots, but put down very deep roots. They should have a deep, well drained, fertile, humus soil. In colder climates, where plants don't grow as large they need a space only 10 to 12 ft. across.

Because filberts are small trees, it is more practical to mulch then than larger nut trees. Use hay, leaves, or other organic material. The nutrients the mulch contributes to the soil is important to maintain of vigorous growth and good nut production. Further to promote growth, you should fertilize the plants with a balanced fertilizer such as 20-10-10. Apply ½ cup after the young plants are making growth; 1 cup the next year; and from then on increase the dosage by 1 cup a year until you reach 6. This is about the maximum for cold climates; but in milder areas, you can increase the supply 30 to 50 per cent.

Filberts start to bear two or three years after they are planted. They reach good production three or four years later, but are likely to become erratic after ten years unless they are pruned severely.

Nuts are harvested from the ground after they drop. If the husks remain, these must be removed. The nuts should then be spread out in a warm dry, shady place to dry.