Can You Grow Hazelnut in a Container?

Growing hazelnut in a container is possible, but it comes with significant practical limitations that are worth understanding before you commit to a large pot. Hazelnut is a naturally vigorous multi-stemmed shrub that can reach four to five metres in height and spread without management, and its root system is extensive. Container growing keeps it smaller but requires consistent management to be sustainable long-term.

Is It Realistic?

A hazelnut in a large container can produce catkins and in favourable circumstances a modest crop of nuts. However, container-grown hazelnuts face several structural challenges. Their root systems are restricted, which limits the nutrient and water supply available to the plant. In a wet climate this may not be the limiting factor, but in a dry summer the plant will need watering almost daily. Root restriction also slows growth considerably — which can actually make management easier — but the plant may never develop the vigour needed to carry a heavy crop.

Container Size

The minimum practical container size for a hazelnut intended to eventually bear a crop is 60–80 litres (approximately a 60cm diameter, 50cm deep pot). Larger is better — a 100–150 litre container gives the root system enough room to sustain a productive plant for several years. Smaller containers can support a young plant for a season or two but will need repotting or the plant will decline. Use a container with generous drainage holes and raise it on feet to prevent the base sitting in pooled water.

Compost and Feeding

Use a loam-based compost such as John Innes No. 3 rather than a purely peat-based growing medium — hazelnut roots need the structure and mineral content that loam provides, and peat-based composts shrink and hydrophobe with age. Mix in additional horticultural grit (about one part grit to four parts compost) to improve drainage. Feed container hazelnuts with a balanced liquid feed every two weeks during the growing season from April to August, then switch to a high-potassium feed through September to harden growth before winter.

Pollination in Container Growing

The pollination requirement does not change for container-grown plants. You still need at least two genetically different varieties within a reasonable distance for wind pollination to work. If you have a patio or terrace, positioning two containers of different compatible varieties close together — one to two metres apart — gives the best chance of pollination success. The containers can be moved around as needed for space management while keeping them adjacent during the January–March flowering period.

Repotting and Long-Term Management

Repot container hazelnuts every two to three years, moving up to a larger container or root-pruning and refreshing the compost if the container has reached its maximum practical size. Root pruning — removing the outer layer of roots and compost in spring and replacing it with fresh compost in the same container — can keep a container hazelnut going indefinitely. Annual pruning to keep the plant compact is also essential; remove the oldest stems back to near the compost surface each autumn to encourage productive young wood.