Hazelnut

Soil Preparation

Before you even think about putting a hazelnut tree in the ground, my friend, let's talk soil. Hazelnuts, like most long-lived plants, appreciate well-drained soil. They really don't like 'wet feet,' so if your soil is heavy clay and tends to stay waterlogged, you'll want to amend it significantly with organic matter like compost or aged manure to improve drainage. A slightly acidic to neutral pH (around 6.0 to 7.0) is ideal. It's always a good idea to get a soil test done a few months before planting. This will tell you exactly what nutrients your soil is lacking and what amendments you might need to add.

Planting

Timing is key for planting. Late fall or early spring, when the trees are dormant, is best. If you're using bare-root trees, plant them as soon as they arrive. Dig a hole wide enough to comfortably spread out the roots and deep enough so that the graft union (if present) is a few inches above the soil line, or if it's a seedling, plant to the same depth as it was in the nursery. Backfill with native soil, gently tamping to remove air pockets. Water thoroughly. Remember, hazelnuts are wind-pollinated, and most varieties require cross-pollination to produce a good crop. This means you'll need to plant at least two different compatible varieties within 50 feet of each other for optimal nut set. Space individual trees about 15-20 feet apart to allow for mature growth and good air circulation.

Watering

Once your young hazelnut trees are in the ground, consistent watering is crucial, especially during their first few years. They need about 1 inch of water per week, either from rain or irrigation. If you're in a dry spell, supplement with deep watering. As the trees mature, they become more drought-tolerant, but they'll still benefit from irrigation during extended dry periods, particularly when nuts are developing in late summer. A layer of mulch around the base of the tree (keeping it a few inches away from the trunk) will help retain soil moisture and suppress weeds.

Fertilizing

Your initial soil test results will guide your fertilization strategy. Generally, young trees benefit from a balanced fertilizer in early spring. Once trees are established and producing, they'll primarily need nitrogen to support leaf and shoot growth, which in turn supports nut production. A good rule of thumb is to apply a balanced fertilizer (like a 10-10-10) in early spring, or use a slow-release organic option. Adjust based on leaf color and growth rate; yellowing leaves might indicate a nitrogen deficiency. Always follow package directions and don't over-fertilize, as this can lead to excessive vegetative growth at the expense of nuts.

Pruning

Pruning hazelnuts can be done to establish either a central leader (single trunk) or a multi-stemmed bush form. For orchards, a central leader is often preferred for easier mechanical harvesting, while a bush form might be more suitable for home growers. Regardless of the form, annual pruning is essential. In late winter or early spring, remove any dead, diseased, or crossing branches. Also, be diligent about removing suckers that emerge from the base of the tree; these compete for nutrients and can reduce nut production. For older trees, some renewal pruning – removing a few old, less productive branches to encourage new growth – can be beneficial.

Harvesting

Harvesting hazelnuts is one of the most satisfying parts of the process! Nuts typically mature from late August through September, depending on your variety and climate. You'll know they're ready when the husks start to turn yellow and the nuts begin to drop naturally to the ground. For small plantings, you can simply wait for them to fall and then gather them by hand. For larger operations, tarps can be spread under the trees, and the branches gently shaken to release the nuts. Mechanical harvesters are also used in commercial orchards. Once collected, the nuts need to be dried properly to prevent mold and ensure good storage. Spread them in a single layer in a well-ventilated area, out of direct sunlight, for a few weeks until the kernels rattle inside their shells. Store them in a cool, dry place.

The story of the hazelnut, or filbert as it's sometimes called, is as old as human civilization itself. Evidence suggests that humans have been gathering and consuming hazelnuts since the Stone Age. Archaeological digs in Scotland have uncovered large pits filled with thousands of burnt hazelnut shells dating back some 9,000 years, indicating that these nuts were a vital part of the diet for early hunter-gatherers. It's truly humbling to think that the very nuts we enjoy today sustained our ancestors millennia ago!

Hazelnut trees, native to temperate regions of the Northern Hemisphere, were naturally widespread across Europe, Asia, and North America. As agriculture developed, these wild nuts began their journey towards domestication. The ancient Greeks and Romans held the hazelnut in high regard, not just for its delicious taste but also for its perceived medicinal properties and as a symbol of wisdom, fertility, and good luck. Pliny the Elder, the Roman naturalist, wrote about the hazelnut, highlighting its value. It was through the vast Roman Empire that hazelnut cultivation began to spread more systematically across Europe.

Over centuries, different cultures developed their own uses and appreciation for the hazelnut. In parts of Asia, especially China, hazelnuts have been cultivated for thousands of years, valued for both food and traditional medicine. The 'filbert' name itself is thought to derive from St. Philbert's Day (August 20th), which often coincides with the ripening of early hazelnut varieties in Europe. Fast forward to the modern era, and the hazelnut has become a global commodity, with massive orchards now found in countries like Turkey, Italy, and the United States, all contributing to its delicious legacy.