UK compost
What compost for pyrenean rock jasmine in the UK?
Androsace pyrenaica
More about pyrenean rock jasmine in the UK
Which compost pyrenean rock jasmine needs
For pyrenean rock jasmine the mix to buy is peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Accepts a range of pH including slightly alkaline; the key requirement is impeccable drainage — a mix of loam, coarse grit, and crushed limestone (for calcareous-origin plants) or granite chips works well.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 pyrenean rock jasmine 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?
Pyrenean Rock Jasmine 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 pyrenean rock jasmine soil & potting-mix guide.
Compost for Pyrenean Rock Jasmine in the UK — frequently asked questions
What compost should I use for pyrenean rock jasmine in the UK?
Use peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Accepts a range of pH including slightly alkaline; the key requirement is impeccable drainage — a mix of loam, coarse grit, and crushed limestone (for calcareous-origin plants) or granite chips works well. 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 pyrenean rock jasmine?
Not on its own — multipurpose compost holds too much water for pyrenean rock jasmine 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 pyrenean rock jasmine perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does pyrenean rock jasmine need grit or perlite added?
Yes — pyrenean rock jasmine 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 pyrenean rock jasmine need?
Always a pot with drainage holes. Loam, sand, and chalk or grit mix; well-drained. 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 pyrenean rock jasmine care
See the full pyrenean rock jasmine care guide, its UK watering and UK hardiness.