Repotting guide

When & how to repot Larryleachia marlothii (Larryleachia marlothii)

Also called Marloth's trichocaulon.

More about larryleachia marlothii

About Larryleachia marlothii

Larryleachia marlothii · also called Marloth's trichocaulon · houseplant

A southern African stem succulent in the milkweed family, formerly placed in Trichocaulon, with a smooth, pale grey-green, leafless columnar to barrel-shaped body marked by tessellated tubercles that mimic a stone or small cactus. It bears tiny, intricately patterned bell-shaped flowers and needs very gritty soil, bright light, and a dry winter rest.

Mature size: Typically 8-15 cm tall and 4-7 cm wide; stays small and slow.

Watch for — Root and basal rot: Overwatering or dense soil rots the base, often without warning. Use a very gritty mix, water minimally, and keep it dry through dormancy.

How to tell larryleachia marlothii needs repotting

Repotting on a calendar is less reliable than reading the plant. For larryleachia marlothii, 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 larryleachia marlothii

Every 2–3 years, into bone-dry mix. Larryleachia marlothii's growth habit — solitary or sparingly clustering leafless stem succulent forming a smooth, columnar to barrel-shaped tuberculate body; slow-growing. — sets the pace. A southern African stem succulent in the milkweed family, formerly placed in Trichocaulon, with a smooth, pale grey-green, leafless columnar to barrel-shaped body marked by tessellated tubercles that mimic a stone or small cactus. It bears tiny, intricately patterned bell-shaped flowers and needs very gritty soil, bright light, and a dry winter rest.

What size pot to step larryleachia marlothii up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Larryleachia marlothii 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 larryleachia marlothii

Spring or summer, while larryleachia marlothii 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 larryleachia marlothii

Repot dry. Do not water larryleachia marlothii 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 very gritty, mostly mineral cactus 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 larryleachia marlothii 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 larryleachia marlothii 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 larryleachia marlothii

Larryleachia marlothii wants very gritty, mostly mineral cactus mix. Use a sharply draining blend dominated by pumice, grit and perlite with little organic matter. A clay pot aids fast drying. Dense, moisture-retentive soil is the chief cause of root and basal rot. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting larryleachia marlothii — frequently asked questions

How often should you repot larryleachia marlothii?

Every 2–3 years, into bone-dry mix for larryleachia marlothii. Repot larryleachia marlothii every 2–3 years into a snug pot of very gritty, mostly mineral cactus 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 larryleachia marlothii need?

When is the best time of year to repot larryleachia marlothii?

Should you water larryleachia marlothii after repotting?

No — not straight away. Repot larryleachia marlothii 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 larryleachia marlothii after repotting?

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