UK compost
What compost for hoya erythrina in the UK?
Hoya erythrina
More about hoya erythrina in the UK
Which compost hoya erythrina needs
For hoya erythrina the mix to buy is peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Use orchid bark, perlite, and a little coir or compost, with optional pumice for extra drainage. The roots need air and must not stay wet. Sharp drainage and a pot with ample holes are key to preventing rot in this colour-responsive species.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 hoya erythrina 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?
Hoya Erythrina 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 hoya erythrina soil & potting-mix guide.
Compost for Hoya Erythrina in the UK — frequently asked questions
What compost should I use for hoya erythrina in the UK?
Use peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Use orchid bark, perlite, and a little coir or compost, with optional pumice for extra drainage. The roots need air and must not stay wet. Sharp drainage and a pot with ample holes are key to preventing rot in this colour-responsive species. 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 hoya erythrina?
Not on its own — multipurpose compost holds too much water for hoya erythrina 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 hoya erythrina perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does hoya erythrina need grit or perlite added?
Yes — hoya erythrina 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 hoya erythrina need?
Always a pot with drainage holes. Free-draining, airy epiphytic mix. 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 hoya erythrina care
See the full hoya erythrina care guide, its UK watering and UK hardiness.