Repotting guide

When & how to repot Mexican Butterwort (Pinguicula moranensis)

Also called Mexican butterwort, Butterwort, Mexican ping, Pinguicula.

More about mexican butterwort

About Mexican Butterwort

Pinguicula moranensis · also called Mexican butterwort, Butterwort · houseplant

Mexican butterwort is a small carnivorous rosette plant from Mexico whose sticky summer leaves trap gnats and fungus flies, then shift to non-carnivorous succulent winter leaves. Give bright light, mineral-free water, and lean gritty soil — never fertiliser. ASPCA does not list it, so treat it as unverified and check with a vet.

Mature size: Summer carnivorous rosette roughly 8-15 cm (3-6 in) across; tight winter succulent rosette only 2-5 cm (1-2 in) wide. Flower stalks rise up to about 25 cm (10 in).

Watch for — Sudden decline after feeding or repotting: Almost always fertiliser or rich soil contact. Butterworts need lean, mineral soil and no feeding at the roots; flush or repot into a peat/perlite or pure-mineral mix.

How to tell mexican butterwort needs repotting

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

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

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 mexican butterwort

Every 2–3 years, into bone-dry mix. Mexican Butterwort's growth habit — low, ground-hugging carnivorous rosette that is seasonally dimorphic (heterophyllous): flat, sticky carnivorous leaves through the warm growing season, switching to a compact, non-carnivorous succulent winter rosette during the cooler, drier months. sends up tall, single pink-to-violet flowers on slender stalks. — sets the pace. Mexican butterwort is a small carnivorous rosette plant from Mexico whose sticky summer leaves trap gnats and fungus flies, then shift to non-carnivorous succulent winter leaves. Give bright light, mineral-free water, and lean gritty soil — never fertiliser. ASPCA does not list it, so treat it as unverified and check with a vet.

What size pot to step mexican butterwort up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Mexican Butterwort stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

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 mexican butterwort

Spring or summer, while mexican butterwort is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting mexican butterwort

Repot dry. Do not water mexican butterwort for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty lean, mineral, nutrient-poor mix ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set mexican butterwort at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep mexican butterwort completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for mexican butterwort

Mexican Butterwort wants lean, mineral, nutrient-poor mix. Never use regular or fertilised potting soil. Grow in a fast-draining inorganic blend such as 1:1 peat and perlite, or a grittier 1:2:1 peat-perlite-sand; many growers use pure pumice, perlite, lava rock, or mineral mixes. Rich soil burns 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 mexican butterwort — frequently asked questions

How often should you repot mexican butterwort?

Every 2–3 years, into bone-dry mix for mexican butterwort. Repot mexican butterwort every 2–3 years into a snug pot of lean, mineral, nutrient-poor mix, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does mexican butterwort need?

When is the best time of year to repot mexican butterwort?

Should you water mexican butterwort after repotting?

No — not straight away. Repot mexican butterwort into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise mexican butterwort after repotting?

Not immediately. Wait about 3 weeks after repotting mexican butterwort. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.