UK compost
What compost for thunberg's cycad in the UK?
Encephalartos longifolius
More about thunberg's cycad in the UK
Which compost thunberg's cycad needs
For thunberg's cycad the mix to buy is peat-free ericaceous (lime-free) compost. A blend of 50% coarse sand or grit, 30% good loam, and 20% composted bark suits this species. It tolerates mildly acidic to mildly alkaline soils (pH 5.5–7.5). Excellent drainage is essential; grow on raised beds or slopes outdoors to prevent waterlogging during wet winters.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 thunberg's cycad 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?
Thunberg's Cycad is a lime-hater: it needs an acidic, lime-free ericaceous compost. In ordinary (limey) multipurpose it slowly yellows between the leaf veins as it locks out iron. Buy a bag labelled "ericaceous", and in a hard-water area water with rainwater where you can, since tap water is slightly alkaline.
For the full recipe, pH and drainage detail (US wording), see the thunberg's cycad soil & potting-mix guide.
Compost for Thunberg's Cycad in the UK — frequently asked questions
What compost should I use for thunberg's cycad in the UK?
Use peat-free ericaceous (lime-free) compost. A blend of 50% coarse sand or grit, 30% good loam, and 20% composted bark suits this species. It tolerates mildly acidic to mildly alkaline soils (pH 5.5–7.5). Excellent drainage is essential; grow on raised beds or slopes outdoors to prevent waterlogging during wet winters. 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 thunberg's cycad?
No — thunberg's cycad needs an acidic, lime-free (ericaceous) compost. Standard multipurpose is too limey and will slowly cause yellowing between the leaf veins (lime-induced chlorosis). Buy a bag labelled "ericaceous".
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 thunberg's cycad perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does thunberg's cycad need grit or perlite added?
Not essential, but a couple of handfuls of perlite in the mix improves aeration and guards against overwatering — useful on a cool, damp British windowsill where compost stays wet longer.
What pot and drainage does thunberg's cycad need?
Always a pot with drainage holes. Sandy, well-draining loam. 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 thunberg's cycad care
See the full thunberg's cycad care guide, its UK watering and UK hardiness.