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Repotting guide

When & how to repot Medlar (Mespilus germanica)

Also called medlar, common medlar.

More about medlar

About Medlar

Mespilus germanica · also called medlar, common medlar · edible

The medlar is an old-fashioned, hardy fruit tree with large white spring blossom and russet-brown fruit eaten after 'bletting' (softening past ripeness) into a spiced apple-butter texture. Picturesque and gnarled with age, it is undemanding, self-fertile and disease-resistant, making an ornamental small tree for orchards and lawns alike.

Mature size: 3-6 m tall and broad, typically a manageable small tree even at maturity.

Watch for — Fungal leaf spot: Damp summers can bring leaf spotting and minor blossom blight; rake fallen leaves and thin the canopy for airflow to limit carry-over.

How to tell medlar needs repotting

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

Pot on seedlings as they grow; not a perennial repot. Medlaris grown for one season, so the question is really “how often to pot on” — keep moving it up before the roots circle. Small, slow-growing deciduous tree, often wider than tall with a low, spreading, twisting crown that grows characterfully gnarled; usually grafted, with crooked picturesque branches..

What size pot to step medlar up to

Pot medlar 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 medlar

Pot medlar 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 medlar

  1. Pot on before it is root-bound. Check medlar 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 fertile, free-draining loam 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 medlar 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 medlar

Medlar wants fertile, free-draining loam. Adaptable to most soils around pH 6.0-7.0, including moderately heavy ground, provided drainage is reasonable. Enrich with compost at planting. It dislikes only very wet, badly drained sites and extremely thin, chalky soils. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting medlar — frequently asked questions

How often should you repot medlar?

Pot on seedlings as they grow; not a perennial repot for medlar. Medlar is a seasonal crop, so you pot it on as a growing plant rather than repotting a perennial. Step seedlings up gradually into fertile, free-draining 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 medlar need?

Pot medlar 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 medlar?

Pot medlar 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 medlar straight into a much bigger pot?

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

Not immediately. Wait about 1 week after repotting medlar. 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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