Repotting guide

When & how to repot Sellow's Sinningia (Sinningia sellovii)

Also called Sellow's Sinningia, Hardy Red Gloxinia, Hardy Gloxinia.

More about sellow's sinningia

About Sellow's Sinningia

Sinningia sellovii · also called Sellow's Sinningia, Hardy Red Gloxinia · flowering

Sinningia sellovii is a tuberous perennial native to Brazil, Bolivia, Paraguay, and Uruguay, where it grows in rocky, open habitats. It produces tubular red to orange-red flowers attractive to hummingbirds and is one of the hardiest Sinningia species, tolerating light frost when its tuber is established in the ground. Allow the tuber to dry out and go dormant in cooler months — do not water during dormancy or the tuber will rot. According to the ASPCA, Sinningia species (closely related to Gloxinia) are listed as non-toxic to cats and dogs.

Mature size: 60–90 cm (24–36 in) tall in bloom.

How to tell sellow's sinningia needs repotting

Repotting on a calendar is less reliable than reading the plant. For sellow's sinningia, 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 sellow's sinningia 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 sellow's sinningia

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, sellow's sinningia is lifted and divided once the clump congests and flowering drops off. Upright tuberous perennial that dies back to a dormant tuber each winter and re-sprouts in spring..

What size pot to step sellow's sinningia up to

Pot size matters less than depth and spacing here. When you replant sellow's sinningia, 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 sellow's sinningia

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 sellow's sinningia in full growth or flower sets it back badly.

Step-by-step: repotting sellow's sinningia

Wait for dormancy. Let sellow's sinningia 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 well-draining loam or gritty 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 sellow's sinningia, 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 sellow's sinningia

Sellow's Sinningia wants well-draining loam or gritty mix. Plant tubers in freely draining, moderately fertile soil enriched with coarse grit or perlite; heavy clay leads to tuber rot especially over winter. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting sellow's sinningia — frequently asked questions

How often should you repot sellow's sinningia?

Lift and divide every 3–4 years once clumps congest for sellow's sinningia. Sellow's Sinningia 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 well-draining loam or gritty mix. Crowding, not pot size, is what reduces flowering over time.

What size pot does sellow's sinningia need?

When is the best time of year to repot sellow's sinningia?

Do you "repot" sellow's sinningia, or lift and divide it?

You lift and divide it. Sellow's Sinningia 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 sellow's sinningia after repotting?

Hold off feeding sellow's sinningia 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.