UK compost
What compost for franz's living stone in the UK?
Lithops francisci
More about franz's living stone in the UK
Which compost franz's living stone needs
For franz's living stone the mix to buy is peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. A highly mineral, fast-draining mix is mandatory. Organic-rich composts retain moisture that causes rot. Top-dress with fine gravel to reflect the rocky quartz substrate of the Northern Cape habitat.In British garden centres the bagged growing medium is sold simply as “compost” (multipurpose, ericaceous, or loam-based John Innes), which is a different thing from the rotted garden “compost” you make in a heap — for a pot you want the bagged kind.
Peat-free compost
Buy peat-free. The sale of peat compost to home gardeners is being phased out across the UK, and the RHS recommends peat-free on environmental grounds. A good peat-free multipurpose grows franz's living stone perfectly well; the one habit to change is watering — peat-free dries faster at the surface while still moist below, so check by feel a knuckle deep rather than trusting the look of the top.
Ericaceous or multipurpose?
Franz's Living Stone does not want a rich, water-holding compost — it wants sharp drainage. Cut peat-free multipurpose roughly half-and-half with horticultural grit, sharp sand or perlite, and always pot into a container with drainage holes. A "cactus and succulent" bagged mix is a ready-made shortcut.
For the full recipe, pH and drainage detail (US wording), see the franz's living stone soil & potting-mix guide.
Compost for Franz's Living Stone in the UK — frequently asked questions
What compost should I use for franz's living stone in the UK?
Use peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. A highly mineral, fast-draining mix is mandatory. Organic-rich composts retain moisture that causes rot. Top-dress with fine gravel to reflect the rocky quartz substrate of the Northern Cape habitat. In UK garden centres this is sold simply as "compost" — the bagged growing medium, not garden-made leaf-mould — so match the description above rather than a brand.
Can I use ordinary multipurpose compost for franz's living stone?
Not on its own — multipurpose compost holds too much water for franz's living stone and will rot the roots. Cut it roughly 50:50 with horticultural grit, sharp sand or perlite so it drains fast.
Should the compost be peat-free?
Yes. Sales of peat compost to home gardeners are being phased out in the UK, and the RHS recommends peat-free for environmental reasons. Modern peat-free multipurpose composts grow franz's living stone perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does franz's living stone need grit or perlite added?
Yes — franz's living stone must have sharp drainage. Add about one part horticultural grit or perlite to one part compost, and always use a pot with drainage holes.
What pot and drainage does franz's living stone need?
Always a pot with drainage holes. Gritty cactus mix: 50% cactus compost and 50% coarse grit or perlite. Stand it on a saucer, empty any water that collects after watering, and never leave the pot sitting in a full outer cover — waterlogged compost in a cool UK room is the commonest cause of root rot.
More franz's living stone care
See the full franz's living stone care guide, its UK watering and UK hardiness.