Repotting guide

When & how to repot Chinese Hazel (Corylus chinensis)

Also called Chinese hazel, Chinese filbert.

More about chinese hazel

About Chinese Hazel

Corylus chinensis · also called Chinese hazel, Chinese filbert · edible

Chinese hazel is one of the largest hazels, a stately single-trunked forest tree native to the mountains of China. Like Turkish hazel it forms a true non-suckering tree rather than a bush, with handsome bark and edible nuts borne in clustered, bristly husks. It suits large gardens and arboreta seeking a long-lived, blight-tolerant specimen.

Mature size: 20-25 m tall and 10-15 m wide where conditions suit it

How to tell chinese hazel needs repotting

Repotting on a calendar is less reliable than reading the plant. For chinese 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 chinese 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 chinese hazel

Pot on seedlings as they grow; not a perennial repot. Chinese Hazelis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Large, vigorous single-trunked deciduous tree with a broad rounded to pyramidal crown and attractive flaking bark; non-suckering. Among the tallest species in the genus..

What size pot to step chinese hazel up to

Pot chinese 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 chinese hazel

Pot chinese 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 chinese hazel

Pot on before it is root-bound. Check chinese 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 deep, fertile, 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 chinese 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 chinese hazel

Chinese Hazel wants deep, fertile, well-drained loam. Does best on deep, moisture-retentive yet free-draining soil of neutral to slightly acid or alkaline pH. Dislikes waterlogging and very thin, droughty ground. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting chinese hazel — frequently asked questions

How often should you repot chinese hazel?

Pot on seedlings as they grow; not a perennial repot for chinese hazel. Chinese Hazel is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into deep, fertile, 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 chinese hazel need?

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

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

No. Even a fast-growing chinese 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 chinese hazel after repotting?

Not immediately. Wait about 1 week after repotting chinese 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.