Repotting guide

When & how to repot Fuller's Living Stone (Lithops fulleri)

Also called Fuller's Mimicry Plant, Pebble Plant.

More about fuller's living stone

About Fuller's Living Stone

Lithops fulleri · also called Fuller's Mimicry Plant, Pebble Plant · houseplant

Lithops fulleri is a South African succulent from the Aizoaceae family, camouflaged as a pale grey-beige pebble. It requires almost no water during dormancy and produces a solitary white or yellow daisy-like flower in autumn. Completely non-toxic to pets and children. The cardinal rule: never overwater — rot is the number-one killer.

Mature size: 2-4 cm tall, individual lobe pairs 2-3 cm wide; slowly forms clusters

How to tell fuller's living stone needs repotting

Repotting on a calendar is less reliable than reading the plant. For fuller's living stone, 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 fuller's living stone

Every 2–3 years, into bone-dry mix. Fuller's Living Stone's growth habit — clump-forming stemless succulent with paired, fused lobes — sets the pace. Lithops fulleri is a South African succulent from the Aizoaceae family, camouflaged as a pale grey-beige pebble. It requires almost no water during dormancy and produces a solitary white or yellow daisy-like flower in autumn. Completely non-toxic to pets and children. The cardinal rule: never overwater — rot is the number-one killer.

What size pot to step fuller's living stone up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Fuller's Living Stone 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 fuller's living stone

Spring or summer, while fuller's living stone 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 fuller's living stone

Repot dry. Do not water fuller's living stone 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 fast-draining cactus/succulent mix with added coarse grit or perlite (50:50) 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 fuller's living stone 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 fuller's living stone 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 fuller's living stone

Fuller's Living Stone wants very fast-draining cactus/succulent mix with added coarse grit or perlite (50:50). Good drainage is non-negotiable. Mix standard cactus compost with equal parts perlite or coarse horticultural grit. A top dressing of fine gravel helps prevent collar rot and mimics the rocky Namaqualand substrate. Avoid any peat-heavy or moisture-retentive 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 fuller's living stone — frequently asked questions

How often should you repot fuller's living stone?

Every 2–3 years, into bone-dry mix for fuller's living stone. Repot fuller's living stone every 2–3 years into a snug pot of very fast-draining cactus/succulent mix with added coarse grit or perlite (50:50), 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 fuller's living stone need?

When is the best time of year to repot fuller's living stone?

Should you water fuller's living stone after repotting?

No — not straight away. Repot fuller's living stone 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 fuller's living stone after repotting?

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