Repotting guide

When & how to repot Calathea Sanderiana (Goeppertia ornata var. sanderiana)

Also called Calathea sanderiana.

More about calathea sanderiana

About Calathea Sanderiana

Goeppertia ornata var. sanderiana · also called Calathea sanderiana · houseplant

Calathea sanderiana is a striking ornata-type prayer plant with broad, glossy dark-green leaves finely pinstriped in pink-to-white lines and flushed deep purple underneath. A larger, bolder form of the pinstripe calathea, it needs warmth, high humidity, and soft water to keep its lines clean. Fully pet-safe and grown for dramatic foliage.

Mature size: Around 60-90 cm tall and wide indoors, larger than the standard ornata pinstripe form.

Watch for — Yellowing leaves: Overwatering or poor drainage. Let the surface dry between waterings and ensure the pot drains freely.

How to tell calathea sanderiana needs repotting

Repotting on a calendar is less reliable than reading the plant. For calathea sanderiana, 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 calathea sanderiana) 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 calathea sanderiana

Only every 2–4 years, when genuinely crowded. Calathea Sanderiana 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. Clump-forming rhizomatous evergreen perennial with upright petioles and large oval leaves that fold upward at night, revealing their purple undersides..

What size pot to step calathea sanderiana up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. Calathea Sanderiana 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 calathea sanderiana 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 calathea sanderiana

Early spring, just as new growth restarts, is the ideal window for calathea sanderiana. 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 calathea sanderiana

Confirm it actually needs it. Slide calathea sanderiana 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 calathea sanderiana 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 rich, airy, moisture-retentive peat-free 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 calathea sanderiana 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 calathea sanderiana

Calathea Sanderiana wants rich, airy, moisture-retentive peat-free mix. Blend coir or peat-free compost with perlite and fine bark for aeration and steady moisture. Slightly acidic (pH 6.0-6.5) and free-draining. A pot with drainage holes is essential, since soggy soil quickly rots the roots. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting calathea sanderiana — frequently asked questions

How often should you repot calathea sanderiana?

Only every 2–4 years, when genuinely crowded for calathea sanderiana. Only repot calathea sanderiana 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 rich, airy, moisture-retentive peat-free mix. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does calathea sanderiana need?

When is the best time of year to repot calathea sanderiana?

Does calathea sanderiana like to be root-bound?

Yes — calathea sanderiana 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 calathea sanderiana after repotting?

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