Repotting guide

When & how to repot Begonia 'Nonstop Red' (Begonia × tuberhybrida 'Nonstop Red')

Also called nonstop red begonia, tuberous nonstop begonia.

More about begonia 'nonstop red'

About Begonia 'Nonstop Red'

Begonia × tuberhybrida 'Nonstop Red' · also called nonstop red begonia, tuberous nonstop begonia · flowering

Begonia 'Nonstop Red' is an upright, compact tuberous begonia from the seed-raised Nonstop series, prized for non-stop, weather-resistant double red blooms from summer to autumn. Its tidy, bushy habit suits beds, borders, and patio pots in light shade. Frost-tender, it dies back to a dormant tuber, and the free-flowering Nonstop strain delivers reliable colour with minimal fuss.

Mature size: Typically 20-30 cm tall and around 20-30 cm wide, forming a neat mound.

How to tell begonia 'nonstop red' needs repotting

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

Flowering has tailed off year on year and the clump has become congested and overcrowded.
Lots of leaf and few flowers — a classic sign that begonia 'nonstop red' bulbs or tubers need lifting and dividing.
Bulbs visibly bursting the pot or pushing each other to the surface.
It is the natural dormancy window (foliage yellowed and died back) — the only safe time to lift and split.

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 'nonstop red'

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, begonia 'nonstop red' is lifted and divided once the clump congests and flowering drops off. Compact, upright tuberous tender perennial from the seed-raised Nonstop series; a bushy, well-branched mound 20-30 cm tall, densely set with double red blooms from summer into autumn. Dies back to a dormant tuber in autumn and can be lifted and stored. Frost-tender and grown as a seasonal bedding and container plant..

What size pot to step begonia 'nonstop red' up to

Pot size matters less than depth and spacing here. When you replant begonia 'nonstop red', set the bulbs or tubers at the correct depth (a rough guide: two to three times their own height of soil over the top) and space them so they are not touching. A wide, shallow pot suits a clump better than a tall narrow one.

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 'nonstop red'

The only safe window is dormancy: wait until the foliage has yellowed and died back naturally, lift and divide then, and replant before or at the start of the next growing season. Disturbing begonia 'nonstop red' in full growth or flower sets it back badly.

Step-by-step: repotting begonia 'nonstop red'

Wait for dormancy. Let begonia 'nonstop red' foliage yellow and die back completely. Lifting while it is in growth wastes the energy it is storing for next year.
Lift carefully. Loosen the soil well away from the bulbs/tubers with a fork and ease the whole clump out without spearing them.
Separate the offsets. Gently pull the clump apart into individual bulbs or tubers. Keep only firm, healthy, blemish-free ones.
Replant at the right depth. Reset them in fresh rich, free-draining potting compost at the correct depth and spacing — not touching — so each has room to bulk up.
Water in and rest. Water once to settle them, then keep on the dry side until growth resumes. Do not feed until leaves are actively growing.

Aftercare

After replanting begonia 'nonstop red', keep the soil barely moist — not wet — until shoots appear; bulbs and tubers rot in cold, saturated soil. Once leaves are growing strongly, resume normal watering. Hold off feeding until the plant is in active growth again.

The right soil mix for begonia 'nonstop red'

Begonia 'Nonstop Red' wants rich, free-draining potting compost. Use a fertile, moisture-retentive yet well-drained compost; a quality peat-free multipurpose mix with added perlite suits pots, while improved humus-rich soil works in borders. Sharp drainage is essential to keep the fleshy tuber from rotting in the cool, damp conditions begonias dislike. 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 'nonstop red' — frequently asked questions

How often should you repot begonia 'nonstop red'?

Lift and divide every 3–4 years once clumps congest for begonia 'nonstop red'. Begonia 'Nonstop Red' is lifted and divided, not "repotted". Every 3–4 years, once the foliage has died back and it is dormant, lift the clump, separate the offsets, and replant at the correct depth in rich, free-draining potting compost. Crowding, not pot size, is what reduces flowering over time.

What size pot does begonia 'nonstop red' need?

When is the best time of year to repot begonia 'nonstop red'?

Do you "repot" begonia 'nonstop red', or lift and divide it?

You lift and divide it. Begonia 'Nonstop Red' grows from bulbs or tubers, so instead of repotting you wait for dormancy, lift the congested clump, separate the healthy offsets, and replant them at the right depth and spacing. Doing this every 3–4 years restores flowering.

Should you fertilise begonia 'nonstop red' after repotting?

Hold off feeding begonia 'nonstop red' until it is in active growth again. Fresh soil already carries enough nutrients to get it re-established, and feeding disturbed roots too soon does more harm than good.