Repotting guide

When & how to repot Camphor Catmint (Nepeta camphorata)

Also called Camphor Catmint, Camphor-Scented Catmint.

More about camphor catmint

About Camphor Catmint

Nepeta camphorata · also called Camphor Catmint, Camphor-Scented Catmint · herb

Camphor Catmint is a strongly aromatic Mediterranean perennial with square stems, grey-green leaves, and small white flowers marked with purple dots. Its distinctive camphor-heavy scent differs from typical catmints. Hardy and drought-tolerant once established, it suits dry herb gardens, gravel plantings, and rock garden edges where drainage is good and sun is plentiful.

Mature size: 40–60 cm tall, 40–60 cm wide

Watch for — Root rot in heavy, wet soils: Heavy clay combined with winter wet causes crown and root rot. Improve drainage before planting by incorporating coarse grit. In containers, use a gritty, well-drained compost mix and ensure drainage holes are clear.

How to tell camphor catmint needs repotting

Repotting on a calendar is less reliable than reading the plant. For camphor catmint, 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 camphor catmint 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 camphor catmint

Pot on seedlings as they grow; not a perennial repot. Camphor Catmintis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Clump-forming, upright to spreading herbaceous perennial.

What size pot to step camphor catmint up to

Pot camphor catmint 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 camphor catmint

Pot camphor catmint 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 camphor catmint

Pot on before it is root-bound. Check camphor catmint 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 well-drained, moderately fertile loam or sandy soil 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 camphor catmint 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 camphor catmint

Camphor Catmint wants well-drained, moderately fertile loam or sandy soil. Prefers neutral to alkaline soils (pH 6.5–8.0) with good drainage. Avoid heavy clay or waterlogged ground. Incorporate grit on heavy soils. Lean soil encourages more compact, aromatic growth. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting camphor catmint — frequently asked questions

How often should you repot camphor catmint?

Pot on seedlings as they grow; not a perennial repot for camphor catmint. Camphor Catmint is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into well-drained, moderately fertile loam or sandy soil 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 camphor catmint need?

When is the best time of year to repot camphor catmint?

Can you put camphor catmint straight into a much bigger pot?

No. Even a fast-growing camphor catmint 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 camphor catmint after repotting?

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