Repotting guide

When & how to repot Utricularia calycifida (Utricularia calycifida)

Also called Cup-fruited Bladderwort, Terrestrial Bladderwort.

More about utricularia calycifida

About Utricularia calycifida

Utricularia calycifida · also called Cup-fruited Bladderwort, Terrestrial Bladderwort · houseplant

Utricularia calycifida is a terrestrial South American bladderwort grown for its unusually broad, veined green leaves that form an attractive rosette-like carpet, topped by pretty purple-veined, yellow-throated flowers. Its microscopic bladder traps catch tiny soil organisms. Tolerant and easy in wet peat, it is one of the more foliage-ornamental and beginner-friendly Utricularia.

Mature size: Leaves 3-8 cm long forming a spreading carpet; flower scapes 10-25 cm tall.

Watch for — Drying out: Letting the medium dry kills the bladder traps and wilts the broad leaves. Keep the pot permanently standing in pure water.

How to tell utricularia calycifida needs repotting

Repotting on a calendar is less reliable than reading the plant. For utricularia calycifida, watch for these signs:

Roots poking out of the drainage holes or coiling visibly around the inside of the pot.
You are watering far more often than you used to because the rootball dries out within a day or two.
Water runs straight through and out the bottom without soaking in.
Top growth has slowed or new utricularia calycifida leaves are noticeably smaller than older ones despite good light.

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 utricularia calycifida

Every 12–18 months — sooner if roots show fast. Utricularia calycifida's growth habit — mat-forming terrestrial carnivore producing comparatively large, broad, conspicuously veined leaves from a network of stolons and microscopic bladder traps; lifts slender scapes of white-to-mauve, purple-veined, yellow-throated flowers. — sets the pace. Utricularia calycifida is a terrestrial South American bladderwort grown for its unusually broad, veined green leaves that form an attractive rosette-like carpet, topped by pretty purple-veined, yellow-throated flowers. Its microscopic bladder traps catch tiny soil organisms. Tolerant and easy in wet peat, it is one of the more foliage-ornamental and beginner-friendly Utricularia.

What size pot to step utricularia calycifida up to

Step up one pot size — about 2–3 cm (an inch) wider. Utricularia calycifida grows fast, so it will fill that space within a season, but jumping several sizes at once still backfires: the unused soil stays soggy and rots even a vigorous root system. One size at a time, every year or so, is the rhythm.

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 utricularia calycifida

Early spring, just as new growth restarts, is the ideal window for utricularia calycifida. 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 utricularia calycifida

Time it for spring. Repot utricularia calycifida in early spring as growth restarts so it re-roots quickly into the fresh soil.
Choose one size up. Pick a pot about 2–3 cm wider with drainage holes. One step only — a much bigger pot stays soggy and rots roots.
Ease the plant out. Water lightly the day before, then tip utricularia calycifida out and gently loosen any roots circling the bottom of the rootball.
Repot at the same depth. Put a layer of fresh wet peat-based carnivorous mix in the new pot, set the plant so its soil line is unchanged, and backfill, firming lightly.
Water and pause feeding. Water once to settle the soil. Hold off fertiliser for about a month — fresh mix already has nutrients and feeding now burns new roots.

Aftercare

Water utricularia calycifida once to settle the soil, then let the surface dry before watering again — fresh mix around the roots stays wetter than the old compacted ball, so the commonest post-repot mistake is overwatering. Keep it out of direct sun for a week or two while roots re-establish. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for utricularia calycifida

Utricularia calycifida wants wet peat-based carnivorous mix. A bog mix of 1:1 to 2:1 peat or coir with sand or perlite, kept permanently wet; it also grows well in live sphagnum. Use only nutrient-poor, acidic media and avoid all enriched potting compost. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting utricularia calycifida — frequently asked questions

How often should you repot utricularia calycifida?

Every 12–18 months — sooner if roots show fast for utricularia calycifida. Repot utricularia calycifida roughly every 12–18 months, in early spring as growth restarts. It grows fast and circles its pot quickly, so step up one size (about 2–3 cm wider) into fresh wet peat-based carnivorous mix. Don't jump several sizes — that soggy excess soil is what rots vigorous roots.

What size pot does utricularia calycifida need?

When is the best time of year to repot utricularia calycifida?

Can you put utricularia calycifida straight into a much bigger pot?

No. Even a fast-growing utricularia calycifida should only go up one pot size at a time. A vastly oversized pot holds a reservoir of wet soil the roots cannot reach, which stays cold and soggy and rots the roots — the opposite of what you wanted.

Should you fertilise utricularia calycifida after repotting?

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