Repotting guide

When & how to repot Begonia 'Maori Haze' (Begonia rex 'Maori Haze')

Also called Maori Haze Begonia, Rex Begonia 'Maori Haze', Painted-Leaf Begonia 'Maori Haze'.

More about begonia 'maori haze'

About Begonia 'Maori Haze'

Begonia rex 'Maori Haze' · also called Maori Haze Begonia, Rex Begonia 'Maori Haze' · houseplant

Begonia 'Maori Haze' is a rhizomatous Rex begonia grown for silvery, pewter-purple, pointed foliage. It thrives in bright indirect light, high humidity above 50%, and evenly moist but well-drained soil. Compact at 10-50cm tall, it suits warm, sheltered indoor spots. Toxic to cats and dogs per the ASPCA, so keep it out of reach.

Mature size: Compact: roughly 10-50cm (4-20in) tall and wide, typically reaching full size within a year (RHS: 0.1-0.5m height and spread).

Watch for — Leaf drop: Sudden loss of leaves usually stems from low humidity, cold stress, or root rot from overwatering. Stabilise warmth and humidity, and let the topsoil dry before watering again.

How to tell begonia 'maori haze' needs repotting

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

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for begonia 'maori haze') flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 'maori haze'

Only every 2–4 years, when genuinely crowded. Begonia 'Maori Haze' is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Rhizomatous, clump-forming and bushy, with an upright tendency. Pointed, triangular silvery-green leaves are flushed with hazy purple. Pinch stems or remove older leaves at the base to encourage a fuller, more compact shape..

What size pot to step begonia 'maori haze' up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Begonia 'Maori Haze' positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping begonia 'maori haze' into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 'maori haze'

Early spring, just as new growth restarts, is the ideal window for begonia 'maori haze'. 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 'maori haze'

Confirm it actually needs it. Slide begonia 'maori haze' out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip begonia 'maori haze' out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh free-draining, humus-rich houseplant mix (slightly acidic to neutral), set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water begonia 'maori haze' again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. 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 'maori haze'

Begonia 'Maori Haze' wants free-draining, humus-rich houseplant mix (slightly acidic to neutral). Use a light, airy, well-drained mix high in organic matter, such as peat-free compost or coco coir blended with perlite or vermiculite. RHS lists loam-based, acid-to-neutral, moist but well-drained soil. Shallow, rhizomatous roots prefer a wide, shallow pot over a deep one. 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 'maori haze' — frequently asked questions

How often should you repot begonia 'maori haze'?

Only every 2–4 years, when genuinely crowded for begonia 'maori haze'. Only repot begonia 'maori haze' every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using free-draining, humus-rich houseplant mix (slightly acidic to neutral). The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does begonia 'maori haze' need?

When is the best time of year to repot begonia 'maori haze'?

Does begonia 'maori haze' like to be root-bound?

Yes — begonia 'maori haze' genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise begonia 'maori haze' after repotting?

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