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Repotting guide

When & how to repot Clementine (Citrus reticulata 'Clementine')

Also called Clementine, Clementine mandarin, Seedless tangerine.

More about clementine

About Clementine

Citrus reticulata 'Clementine' · also called Clementine, Clementine mandarin · edible

Clementines are compact, nearly seedless mandarin cultivars prized for sweet, easy-peel fruit. Suited to container growing in cooler climates with a sunny windowsill or conservatory. Frost-tender outdoors but manageable in pots brought inside for winter. Toxic to pets via citrus oils in the foliage and rind.

Mature size: 1.5-2.5 m in containers; up to 4 m in the ground in warm climates

How to tell clementine needs repotting

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

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 clementine

Pot on seedlings as they grow; not a perennial repot. Clementineis grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Evergreen small tree or large shrub.

What size pot to step clementine up to

Pot clementine 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 clementine

Pot clementine 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 clementine

  1. Pot on before it is root-bound. Check clementine regularly; move it up as soon as roots reach the edge of the cell or pot, not after they have circled.
  2. 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.
  3. 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.
  4. Pot into rich mix. Set it into fresh free-draining slightly acidic loam or citrus compost at the same depth (tomatoes are the exception — they can go deeper to root along the stem).
  5. Water in and grow on. Water well, keep it in good light, and resume feeding once it is established and growing again.

Aftercare

Water clementine 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 clementine

Clementine wants free-draining slightly acidic loam or citrus compost. pH 6.0-6.5. Use a dedicated citrus or Mediterranean potting mix with added perlite for drainage. Avoid peat-heavy mixes that retain too much moisture. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting clementine — frequently asked questions

How often should you repot clementine?

Pot on seedlings as they grow; not a perennial repot for clementine. Clementine is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into free-draining slightly acidic loam or citrus compost 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 clementine need?

Pot clementine 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. Use our pot size calculator to size it from the plant's current pot and root spread.

When is the best time of year to repot clementine?

Pot clementine 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.

Can you put clementine straight into a much bigger pot?

No. Even a fast-growing clementine 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 clementine after repotting?

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

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