Hazelnut trees typically stay under 20 feet tall, making them perfect for small yards. But exactly how tall do hazelnut trees grow? Most varieties reach between 12 and 20 feet at maturity, though some can stretch a bit taller under ideal conditions.
You might be surprised to learn that these trees are actually large shrubs in many cases. They grow as multi-stemmed bushes rather than single-trunk trees. This natural shape keeps them compact and easy to manage.
Let’s break down the exact heights you can expect from different hazelnut types. We’ll cover everything from dwarf varieties to the tallest cultivars.
How Tall Do Hazelnut Trees Grow
The answer depends on which type you plant. American hazelnuts (Corylus americana) typically grow 10 to 15 feet tall. European hazelnuts (Corylus avellana) can reach 15 to 20 feet. Some hybrids fall in between.
Here’s a quick height breakdown by variety:
- American hazelnut: 10–15 feet
- European hazelnut: 15–20 feet
- Beaked hazelnut: 8–12 feet
- Turkish hazelnut: 20–25 feet
- Hybrid cultivars: 12–18 feet
Most home gardeners choose European or American types. These stay manageable without special pruning. You can easily harvest nuts from a 15-foot tree with a simple picking pole.
Factors That Affect Final Height
Several things influence how tall your hazelnut tree will grow. Soil quality matters a lot. Rich, well-draining soil encourages deeper roots and taller growth. Poor soil keeps trees smaller.
Sunlight is another key factor. Hazelnuts need full sun to reach their potential height. Six to eight hours of direct sunlight daily is ideal. Less light means slower growth and shorter trees.
Water availability also plays a role. Consistent moisture during the first few years helps trees establish. Once mature, they tolerate some drought but won’t grow as tall.
Growth Rate Expectations
Hazelnuts are moderate growers. You can expect 12 to 24 inches of new growth each year. This means a 2-foot sapling might reach 6 feet in three years. Full height usually takes 8 to 12 years.
Here’s a typical growth timeline:
- Year 1: 1–2 feet tall (newly planted)
- Year 3: 4–6 feet tall
- Year 5: 8–10 feet tall
- Year 8: 12–15 feet tall
- Year 12: 15–20 feet (full maturity)
Some trees grow faster with optimal care. Fertilizing in spring and regular watering can speed things up. But don’t expect miracles—hazelnuts are naturally slow compared to poplars or willows.
Pruning To Control Height
You can keep hazelnut trees shorter than their natural maximum. Regular pruning helps maintain a manageable size. Most gardeners prune to 8–12 feet for easy harvesting.
Here’s how to prune for height control:
- Remove the tallest central stem each winter
- Cut back side branches to outward-facing buds
- Thin out old wood to encourage new growth
- Keep 6–8 main stems for best nut production
Pruning also improves air circulation and sunlight penetration. This reduces disease risk and boosts yields. A well-pruned hazelnut stays healthy and productive for decades.
Dwarf Varieties For Small Spaces
If you’re really tight on space, consider dwarf hazelnut varieties. These stay under 8 feet tall naturally. They’re perfect for containers or tiny gardens.
Some popular dwarf options include:
- ‘Contorta’ (corkscrew hazel): 6–8 feet
- ‘Red Majestic’: 6–8 feet
- ‘Aurea’: 8–10 feet
- ‘Fuscorubra’: 8–10 feet
These varieties also offer ornamental value. ‘Contorta’ has twisted branches that look great in winter. ‘Red Majestic’ produces purple leaves and catkins. You get nuts plus visual interest.
Comparing Hazelnut To Other Nut Trees
Hazelnuts are among the smallest nut trees you can grow. This makes them ideal for urban yards. Here’s how they compare to common alternatives:
| Tree Type | Typical Height | Space Needed |
|---|---|---|
| Hazelnut | 12–20 feet | 10–15 feet |
| Almond | 15–30 feet | 15–20 feet |
| Walnut | 50–75 feet | 30–40 feet |
| Pecan | 70–100 feet | 40–50 feet |
| Chestnut | 50–80 feet | 30–40 feet |
As you can see, hazelnuts are the most space-efficient choice. You can plant them 10 feet apart for a hedge. Or give them 15 feet for individual specimen trees.
Spacing Considerations
Proper spacing affects how tall hazelnut trees grow. Crowded trees compete for light and nutrients. This can stunt their height and reduce nut production.
Follow these spacing guidelines:
- For hedgerows: 8–10 feet apart
- For individual trees: 12–15 feet apart
- From buildings: 8–10 feet away
- From fences: 5–6 feet away
Give them room to spread their branches. Hazelnuts have a bushy habit that needs space. Proper spacing also makes pruning and harvesting easier.
Climate And Regional Height Differences
Where you live affects how tall hazelnut trees grow. Colder climates tend to produce shorter trees. Warmer regions with longer growing seasons see taller specimens.
In USDA zones 4–5, hazelnuts often stay under 15 feet. The short growing season limits their growth. In zones 6–8, they can reach 18–20 feet with ease. Zone 9 may see even taller trees, but heat stress can be an issue.
Here’s a regional height guide:
- Pacific Northwest: 15–20 feet (ideal climate)
- Northeast US: 12–16 feet
- Midwest US: 10–14 feet
- Southeast US: 12–18 feet
- UK and Europe: 12–18 feet
Microclimates also matter. A sheltered spot near a south-facing wall can add 2–3 feet of height. Exposed windy sites keep trees shorter.
Soil Type Impact
Soil composition directly affects root development and overall height. Hazelnuts prefer loamy, well-drained soil with a pH between 6.0 and 7.5. Sandy soils drain too fast and limit growth. Clay soils can waterlog roots and stunt trees.
If your soil is less than ideal, consider amending it. Add organic matter like compost to improve drainage and fertility. Raised beds also work well for hazelnuts in heavy clay areas.
A soil test before planting is a good idea. It tells you exactly what nutrients are lacking. You can then fertilize accordingly to support optimal height.
Harvesting At Different Heights
Tree height affects how you harvest nuts. Shorter trees are easier to pick by hand. Taller trees require tools or ladders.
Here’s what to expect at different heights:
- Under 8 feet: Hand pick easily
- 8–12 feet: Use a picking pole or shake branches
- 12–15 feet: Need a ladder or long pole
- Over 15 feet: Use tarps and shake vigorously
Most home growers prefer trees under 12 feet. This keeps harvesting simple and safe. You can always prune to maintain this height.
Nut Yield By Tree Size
Larger trees generally produce more nuts. But the relationship isn’t linear. A 15-foot tree might yield 10–15 pounds of nuts. A 20-foot tree might give 20–25 pounds. However, smaller trees are easier to manage and harvest.
For most home gardens, a 12-foot tree is ideal. It produces enough nuts for a family without being too tall. You get a good balance of yield and convenience.
Dwarf varieties yield less—maybe 3–5 pounds per tree. But they’re perfect for small spaces or containers. You can grow several dwarfs in the same area as one standard tree.
Common Height-Related Problems
Sometimes hazelnut trees don’t reach expected heights. Here are common issues and solutions:
- Poor soil: Amend with compost and fertilizer
- Insufficient light: Prune nearby trees or relocate
- Root competition: Remove grass and weeds around base
- Pest damage: Treat for aphids, mites, or borers
- Disease: Fungal infections can stunt growth
If your tree is growing slower than expected, check these factors first. Most problems are fixable with proper care. Patience is also key—hazelnuts take time to establish.
When Height Becomes A Problem
Sometimes hazelnut trees grow too tall for their space. This happens when they’re planted too close to buildings or power lines. Or when you choose a variety that’s too vigorous.
If your tree is too tall, you have options:
- Prune it back gradually over 2–3 years
- Replace it with a dwarf variety
- Train it as a hedge instead of a tree
- Accept the height and adjust harvesting methods
Never cut more than one-third of the tree in a single year. This stresses the plant and reduces nut production. Gradual reduction is safer and more effective.
Frequently Asked Questions
What is the average height of a mature hazelnut tree?
Most mature hazelnut trees reach 12 to 20 feet tall. American varieties stay shorter at 10–15 feet. European types can hit 15–20 feet. Dwarf varieties stay under 8 feet.
How long does it take for a hazelnut tree to reach full height?
It takes 8 to 12 years for hazelnut trees to reach their full height. They grow 12–24 inches per year. Optimal conditions like good soil and full sun can speed this up slightly.
Can I keep a hazelnut tree small by pruning?
Yes, regular pruning keeps hazelnut trees at any height you want. Annual winter pruning to remove the tallest stems maintains a compact shape. You can easily keep them under 10 feet.
Do hazelnut trees grow taller in pots?
No, container-grown hazelnuts stay smaller than ground-planted ones. Root restriction limits their height. A potted hazelnut typically reaches 4–8 feet, depending on container size.
What is the tallest hazelnut tree variety?
Turkish hazelnut (Corylus colurna) is the tallest, reaching 20–25 feet. It’s less common in home gardens. European and American hybrids usually stay under 20 feet.
Understanding how tall hazelnut trees grow helps you plan your garden space. Most varieties fit perfectly in small yards. With proper care and occasional pruning, you can enjoy fresh hazelnuts without worrying about overgrown trees.
Choose a variety that matches your space and climate. Give it good soil, full sun, and regular water. In a few years, you’ll have a productive tree that’s just the right height for your needs.