UK compost
What compost for didier's angraecum in the UK?
Angraecum didieri
More about didier's angraecum in the UK
Which compost didier's angraecum needs
For didier's angraecum the mix to buy is peat-free multipurpose compost. A mixture of conifer bark chips and horticultural charcoal with a thick drainage layer suits potted specimens. Alternatively, mount on cork bark or driftwood with a thin pad of live sphagnum beneath the roots. The species is extremely sensitive to repotting and may refuse to bloom for 1–2 years after transplanting — repot only when the medium has completely decomposed or the plant is severely salt-stressed.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 didier's angraecum 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?
Didier's Angraecum is straightforward: an ordinary peat-free multipurpose compost is right. For a big specimen or a pot it will live in for years, mixing in some loam-based John Innes No.2 or No.3 adds weight and holds nutrients longer. Ericaceous compost is not needed unless a plant is specifically a lime-hater.
For the full recipe, pH and drainage detail (US wording), see the didier's angraecum soil & potting-mix guide.
Compost for Didier's Angraecum in the UK — frequently asked questions
What compost should I use for didier's angraecum in the UK?
Use peat-free multipurpose compost. A mixture of conifer bark chips and horticultural charcoal with a thick drainage layer suits potted specimens. Alternatively, mount on cork bark or driftwood with a thin pad of live sphagnum beneath the roots. The species is extremely sensitive to repotting and may refuse to bloom for 1–2 years after transplanting — repot only when the medium has completely decomposed or the plant is severely salt-stressed. 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 didier's angraecum?
Yes. A good peat-free multipurpose compost is exactly right for didier's angraecum. For a large or long-term pot you can mix in some John Innes No.2 or No.3 (loam-based) for extra weight and staying power.
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 didier's angraecum perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does didier's angraecum 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 didier's angraecum need?
Always a pot with drainage holes. Bark-and-charcoal mix with excellent drainage; or mounted on cork bark with sphagnum. 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 didier's angraecum care
See the full didier's angraecum care guide, its UK watering and UK hardiness.