Repotting guide

When & how to repot Sinningia concinna (Sinningia concinna)

Also called concinna sinningia, miniature gloxinia.

More about sinningia concinna

About Sinningia concinna

Sinningia concinna · also called concinna sinningia, miniature gloxinia · flowering

Sinningia concinna is a tiny tuberous gesneriad from Brazil, one of the smallest in the genus, with rosettes of small hairy leaves and outsized purple-and-white tubular flowers. A parent of many micro-miniature hybrids, it thrives in warm, humid, bright-indirect conditions and is ideal for terrariums. The ASPCA lists Sinningia (gloxinia) as non-toxic to pets.

Mature size: Very small — typically 5-8 cm tall and wide, among the smallest of the genus.

Watch for — Tuber rot: Overwatering or heavy, soggy soil. Use a gritty free-draining mix, water only when the surface dries, and never leave the pot standing in water.

How to tell sinningia concinna needs repotting

Repotting on a calendar is less reliable than reading the plant. For sinningia concinna, 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 sinningia concinna 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 sinningia concinna

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, sinningia concinna is lifted and divided once the clump congests and flowering drops off. Micro-miniature tuberous perennial forming a low rosette of small hairy leaves a few centimetres across, with large flowers relative to the plant; may go dormant from a small tuber..

What size pot to step sinningia concinna up to

Pot size matters less than depth and spacing here. When you replant sinningia concinna, 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 sinningia concinna

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 sinningia concinna in full growth or flower sets it back badly.

Step-by-step: repotting sinningia concinna

Wait for dormancy. Let sinningia concinna 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 light, very free-draining african-violet or gesneriad mix 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 sinningia concinna, 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 sinningia concinna

Sinningia concinna wants light, very free-draining african-violet or gesneriad mix. An airy blend of peat or coir with plenty of perlite suits the small tuber and fine roots. Sharp drainage is essential, as the little tuber rots easily in heavy, wet soil. A small, shallow pot is best. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting sinningia concinna — frequently asked questions

How often should you repot sinningia concinna?

Lift and divide every 3–4 years once clumps congest for sinningia concinna. Sinningia concinna 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 light, very free-draining african-violet or gesneriad mix. Crowding, not pot size, is what reduces flowering over time.

What size pot does sinningia concinna need?

When is the best time of year to repot sinningia concinna?

Do you "repot" sinningia concinna, or lift and divide it?

You lift and divide it. Sinningia concinna 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 sinningia concinna after repotting?

Hold off feeding sinningia concinna 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.