Repotting guide

When & how to repot Bertolonia maculata (Bertolonia maculata)

Also called Spotted bertolonia, Jewel orchid bertolonia.

More about bertolonia maculata

About Bertolonia maculata

Bertolonia maculata · also called Spotted bertolonia, Jewel orchid bertolonia · tropical

Bertolonia maculata is a Brazilian rainforest-floor jewel plant in the Melastomataceae, grown for velvety olive leaves marked with silvery central striping and purple undersides. A classic terrarium subject, it demands filtered light, constant warmth, and humidity of 70-80%. Open-room culture rarely succeeds; it needs the still, moist air of an enclosed case.

Mature size: 10-20 cm tall with a slightly wider spread; reaches full size in 2-4 years.

Watch for — Fungal spotting: Saturated foliage in stagnant air leads to grey or brown rot patches. Keep water off the leaves and provide gentle ventilation.

How to tell bertolonia maculata needs repotting

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

Roots poking out of the drainage holes or coiling visibly around the inside of the pot.
You are watering far more often than you used to because the rootball dries out within a day or two.
Water runs straight through and out the bottom without soaking in.
Top growth has slowed or new bertolonia maculata leaves are noticeably smaller than older ones despite good light.

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 bertolonia maculata

Every 12–18 months — sooner if roots show fast. Bertolonia maculata's growth habit — low, compact, mound-forming herb with short creeping stems and rosetted, velvety foliage. — sets the pace. Bertolonia maculata is a Brazilian rainforest-floor jewel plant in the Melastomataceae, grown for velvety olive leaves marked with silvery central striping and purple undersides. A classic terrarium subject, it demands filtered light, constant warmth, and humidity of 70-80%. Open-room culture rarely succeeds; it needs the still, moist air of an enclosed case.

What size pot to step bertolonia maculata up to

Step up one pot size — about 2–3 cm (an inch) wider. Bertolonia maculata grows fast, so it will fill that space within a season, but jumping several sizes at once still backfires: the unused soil stays soggy and rots even a vigorous root system. One size at a time, every year or so, is the rhythm.

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 bertolonia maculata

Early spring, just as new growth restarts, is the ideal window for bertolonia maculata. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting bertolonia maculata

Time it for spring. Repot bertolonia maculata in early spring as growth restarts so it re-roots quickly into the fresh soil.
Choose one size up. Pick a pot about 2–3 cm wider with drainage holes. One step only — a much bigger pot stays soggy and rots roots.
Ease the plant out. Water lightly the day before, then tip bertolonia maculata out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh rich, organic, free-draining terrarium mix in the new pot, set the plant so its soil line is unchanged, and backfill, firming lightly.
Water and pause feeding. Water once to settle the soil. Hold off fertiliser for about a month — fresh mix already has nutrients and feeding now burns new roots.

Aftercare

Water bertolonia maculata once to settle the soil, then let the surface dry before watering again — fresh mix around the roots stays wetter than the old compacted ball, so the commonest post-repot mistake is overwatering. Keep it out of direct sun for a week or two while roots re-establish. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for bertolonia maculata

Bertolonia maculata wants rich, organic, free-draining terrarium mix. A loose coir or peat base with leaf mould, fine bark, and perlite holds moisture while keeping air around the shallow roots; consistently moist but never waterlogged. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting bertolonia maculata — frequently asked questions

How often should you repot bertolonia maculata?

Every 12–18 months — sooner if roots show fast for bertolonia maculata. Repot bertolonia maculata roughly every 12–18 months, in early spring as growth restarts. It grows fast and circles its pot quickly, so step up one size (about 2–3 cm wider) into fresh rich, organic, free-draining terrarium mix. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does bertolonia maculata need?

When is the best time of year to repot bertolonia maculata?

Can you put bertolonia maculata straight into a much bigger pot?

No. Even a fast-growing bertolonia maculata 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 bertolonia maculata after repotting?

Not immediately. Wait about 4 weeks after repotting bertolonia maculata. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.