Repotting guide

When & how to repot Painted Begonia (Begonia picta)

Also called Painted begonia, Himalayan begonia.

More about painted begonia

About Painted Begonia

Begonia picta · also called Painted begonia, Himalayan begonia · tropical

Begonia picta is a fibrous-rooted or weakly rhizomatous species native to the Himalayan foothills of Nepal, Bhutan, and northeastern India, where it grows on shaded, moist rock ledges and forest banks at elevations of 1,000–2,500 m. The leaves are dark green with conspicuous silvery-white spots or blotches that give the plant its 'painted' common name, and the small flowers are white to pale pink. Its montane origin means it tolerates slightly cooler temperatures than many tropical begonias, making it somewhat more adaptable to British interiors. The ASPCA lists Begonia species as toxic to cats, dogs, and horses.

Mature size: 20–35 cm (8–14 in) tall and 25–40 cm (10–16 in) wide indoors.

Watch for — Loss of silver leaf markings: Insufficient light causes the distinctive silver spotting to fade, with leaves becoming uniformly dark green and slightly smaller. Move to a brighter (but still indirect) position to restore the patterning.

How to tell painted begonia needs repotting

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

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

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 painted begonia

Every 2–3 years, into bone-dry mix. Painted Begonia's growth habit — compact, upright to slightly spreading fibrous-rooted perennial bearing asymmetric, dark-green leaves conspicuously marked with silver-white spots or streaks; small white to pale-pink flowers appear in cymes. — sets the pace. Begonia picta is a fibrous-rooted or weakly rhizomatous species native to the Himalayan foothills of Nepal, Bhutan, and northeastern India, where it grows on shaded, moist rock ledges and forest banks at elevations of 1,000–2,500 m. The leaves are dark green with conspicuous silvery-white spots or blotches that give the plant its 'painted' common name, and the small flowers are white to pale pink. Its montane origin means it tolerates slightly cooler temperatures than many tropical begonias, making it somewhat more adaptable to British interiors. The ASPCA lists Begonia species as toxic to cats, dogs, and horses.

What size pot to step painted begonia up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Painted Begonia stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

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 painted begonia

Spring or summer, while painted begonia is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting painted begonia

Repot dry. Do not water painted begonia for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty gritty, free-draining loam-based or peat-free mix ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set painted begonia at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep painted begonia completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for painted begonia

Painted Begonia wants gritty, free-draining loam-based or peat-free mix. A mix of peat-free compost, perlite, and a small amount of horticultural grit (3:1:1 ratio) replicates the rocky, fast-draining substrates of its Himalayan habitat. Avoid moisture-retentive mixes that stay wet between waterings. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting painted begonia — frequently asked questions

How often should you repot painted begonia?

Every 2–3 years, into bone-dry mix for painted begonia. Repot painted begonia every 2–3 years into a snug pot of gritty, free-draining loam-based or peat-free mix, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does painted begonia need?

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

Should you water painted begonia after repotting?

No — not straight away. Repot painted begonia into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise painted begonia after repotting?

Not immediately. Wait about 3 weeks after repotting painted begonia. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.