Repotting guide

When & how to repot Blood-red Bertolonia (Bertolonia sanguinea)

Also called Blood-red Bertolonia, Crimson Jewel Plant.

More about blood-red bertolonia

About Blood-red Bertolonia

Bertolonia sanguinea · also called Blood-red Bertolonia, Crimson Jewel Plant · tropical

Blood-red Bertolonia is a striking Brazilian tropical notable for its rich, deep crimson-red undersides and dark, velvety green upper leaf surfaces with silver striping. Native to the humid Atlantic Forest understorey, it demands terrarium conditions — high humidity, warmth, and shade — and rewards specialist growers with one of the most dramatic leaf colorations in the genus.

Mature size: 12–22 cm tall, spreading 20–35 cm

Watch for — Fungal leaf spots: Water trapped on the velvety leaves in stagnant air encourages fungal lesions. Water at the base only, and ensure gentle but consistent air movement inside the terrarium enclosure.

How to tell blood-red bertolonia needs repotting

Repotting on a calendar is less reliable than reading the plant. For blood-red bertolonia, 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 blood-red bertolonia) 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 blood-red bertolonia

Only every 2–4 years, when genuinely crowded. Blood-red Bertolonia 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. Compact, low rosette-forming herb with shortly creeping rhizomes.

What size pot to step blood-red bertolonia up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Blood-red Bertolonia 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 blood-red bertolonia 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 blood-red bertolonia

Early spring, just as new growth restarts, is the ideal window for blood-red bertolonia. 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 blood-red bertolonia

Confirm it actually needs it. Slide blood-red bertolonia 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 blood-red bertolonia 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 lightweight, moisture-retentive, humus-rich mix, 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 blood-red bertolonia 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 blood-red bertolonia

Blood-red Bertolonia wants lightweight, moisture-retentive, humus-rich mix. A combination of fine coco coir, perlite, and finely composted bark (3:1:1) works well. Slight acidity (pH 5.5–6.2) matches the species' natural leaf-litter substrate. Avoid any compacting medium. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting blood-red bertolonia — frequently asked questions

How often should you repot blood-red bertolonia?

Only every 2–4 years, when genuinely crowded for blood-red bertolonia. Only repot blood-red bertolonia 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 lightweight, moisture-retentive, humus-rich mix. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does blood-red bertolonia need?

When is the best time of year to repot blood-red bertolonia?

Does blood-red bertolonia like to be root-bound?

Yes — blood-red bertolonia 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 blood-red bertolonia after repotting?

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