Repotting guide

When & how to repot Begonia scharffii (Begonia scharffii)

Also called elephant ear begonia, hairy begonia, scharff's begonia.

More about begonia scharffii

About Begonia scharffii

Begonia scharffii · also called elephant ear begonia, hairy begonia · houseplant

Begonia scharffii is a soft-stemmed Brazilian cane-type begonia prized for large velvety olive leaves with deep red undersides, covered in fine white hairs. It produces drooping clusters of pale-pink blooms on and off through the year. Give it bright indirect light, warmth, even moisture, and high humidity, and avoid wetting the fuzzy foliage.

Mature size: Typically 60-120 cm tall and 30-45 cm wide indoors; taller in ideal conservatory conditions.

How to tell begonia scharffii needs repotting

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

Every 12–18 months — sooner if roots show fast. Begonia scharffii's growth habit — upright, branching cane-type begonia with soft, somewhat brittle fleshy stems that can become leggy and need occasional pinching or staking to stay bushy. — sets the pace. Begonia scharffii is a soft-stemmed Brazilian cane-type begonia prized for large velvety olive leaves with deep red undersides, covered in fine white hairs. It produces drooping clusters of pale-pink blooms on and off through the year. Give it bright indirect light, warmth, even moisture, and high humidity, and avoid wetting the fuzzy foliage.

What size pot to step begonia scharffii up to

Step up one pot size — about 2–3 cm (an inch) wider. Begonia scharffii 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 begonia scharffii

Early spring, just as new growth restarts, is the ideal window for begonia scharffii. 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 begonia scharffii

Time it for spring. Repot begonia scharffii 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 begonia scharffii out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh light, free-draining peat- or coir-based 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 begonia scharffii 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 begonia scharffii

Begonia scharffii wants light, free-draining peat- or coir-based mix. Use an airy potting mix amended with perlite and a little bark or leaf mold. Good drainage is essential; the thick soft stems rot quickly in dense, water-retentive compost. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting begonia scharffii — frequently asked questions

How often should you repot begonia scharffii?

Every 12–18 months — sooner if roots show fast for begonia scharffii. Repot begonia scharffii 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 light, free-draining peat- or coir-based mix. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does begonia scharffii need?

When is the best time of year to repot begonia scharffii?

Can you put begonia scharffii straight into a much bigger pot?

No. Even a fast-growing begonia scharffii 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 begonia scharffii after repotting?

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