UK compost
What compost for alan fradd rock rose in the UK?
Cistus × purpureus 'Alan Fradd'
More about alan fradd rock rose in the UK
Which compost alan fradd rock rose needs
For alan fradd rock rose the mix to buy is peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Plant in gritty, fast-draining soil at pH 6.0–8.0. Heavy or waterlogged soils cause fatal root rot, particularly over winter. For containers, use a loam-based compost with 30–40% horticultural grit and ensure drainage holes are unobstructed. May show minor chlorosis on very chalky soils after several years.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 alan fradd rock rose 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?
Alan Fradd Rock Rose 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 alan fradd rock rose soil & potting-mix guide.
Compost for Alan Fradd Rock Rose in the UK — frequently asked questions
What compost should I use for alan fradd rock rose in the UK?
Use peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Plant in gritty, fast-draining soil at pH 6.0–8.0. Heavy or waterlogged soils cause fatal root rot, particularly over winter. For containers, use a loam-based compost with 30–40% horticultural grit and ensure drainage holes are unobstructed. May show minor chlorosis on very chalky soils after several years. 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 alan fradd rock rose?
Not on its own — multipurpose compost holds too much water for alan fradd rock rose 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 alan fradd rock rose perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does alan fradd rock rose need grit or perlite added?
Yes — alan fradd rock rose 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 alan fradd rock rose need?
Always a pot with drainage holes. Well-drained, low-fertility; tolerates chalk, sand, coastal sand, and stony ground. 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 alan fradd rock rose care
See the full alan fradd rock rose care guide, its UK watering and UK hardiness.