Repotting guide

When & how to repot Turkish Hazel (Corylus colurna)

Also called Turkish hazel, Turkish filbert, tree hazel.

More about turkish hazel

About Turkish Hazel

Corylus colurna · also called Turkish hazel, Turkish filbert · edible

Turkish hazel is a large, single-trunked tree hazel with a strikingly symmetrical pyramidal crown and corky, flaking bark. Unusually for the genus it grows as a true tree rather than a suckering bush, making it a tough urban street and specimen tree. It bears small, thick-shelled edible nuts and tolerates heat, drought, and poor soil.

Mature size: 12-20 m tall and 6-10 m wide at maturity

Watch for — Slow establishment: Turkish hazel is slow to start and may sit for a year or two after planting before accelerating. This is normal; keep it watered and avoid disturbing the roots.

How to tell turkish hazel needs repotting

Repotting on a calendar is less reliable than reading the plant. For turkish hazel, watch for these signs:

Roots circling the bottom of the module or pot, or poking out of the drainage holes.
The seedling dries out within a day and growth has visibly stalled.
Roots are white and matted in a tight spiral when you tip the plant out.
It has outgrown its current container for the stage of the season — pot turkish hazel on before it becomes hard root-bound.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot turkish hazel

Pot on seedlings as they grow; not a perennial repot. Turkish Hazelis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Strongly upright single-trunked tree with a broadly pyramidal to conical crown; non-suckering, unlike bush hazels, with distinctive pale, corky, scaling bark. Slow to moderate growth and long-lived..

What size pot to step turkish hazel up to

Pot turkish hazel on gradually — a seedling jumped straight into a huge pot sits in cold, wet, airless soil and stalls. Step up one or two sizes at a time as the roots fill each container, finishing in a large final pot or the ground. The aim is roots that never circle and never check.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot turkish hazel

Pot turkish hazel on through the active growing season, whenever roots fill the current container — there is no single date, just "before it becomes root-bound". Avoid potting on during a cold snap.

Step-by-step: repotting turkish hazel

Pot on before it is root-bound. Check turkish hazel regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
Step up one or two sizes. Choose the next container up — not a giant one. Cold, wet, unused soil around a small root system stalls seedlings.
Knock it out gently. Support the stem, tip the pot, and ease the rootball out without breaking it. A little teasing of circled roots at the base is fine.
Pot into rich mix. Set it into fresh wide tolerance; prefers well-drained loam at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water turkish hazel in well and keep it in bright light; a freshly potted-on seedling can wilt for a day while roots settle, so do not overcompensate by drowning it. Do not fertilise for about 1 week — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for turkish hazel

Turkish Hazel wants wide tolerance; prefers well-drained loam. Adaptable to a broad pH range including chalky, alkaline soils, and copes with compacted urban ground and clay better than most hazels. Avoid permanently waterlogged sites. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting turkish hazel — frequently asked questions

How often should you repot turkish hazel?

Pot on seedlings as they grow; not a perennial repot for turkish hazel. Turkish Hazel is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into wide tolerance; prefers well-drained loam so the roots never circle the cell, ending in a large final container. A root-bound transplant stalls and never fully recovers.

What size pot does turkish hazel need?

When is the best time of year to repot turkish hazel?

Can you put turkish hazel straight into a much bigger pot?

No. Even a fast-growing turkish hazel should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise turkish hazel after repotting?

Not immediately. Wait about 1 week after repotting turkish hazel. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.