UK compost
What compost for autumn moor grass in the UK?
Sesleria autumnalis
More about autumn moor grass in the UK
Which compost autumn moor grass needs
For autumn moor grass the mix to buy is peat-free multipurpose compost. Native to alkaline rocky hillsides and open woodlands. One of few ornamental grasses that actively thrives on chalk or limestone soils. Excellent for dry slopes, under-tree planting, or alkaline conditions that would defeat other grasses.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 autumn moor grass 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?
Autumn Moor Grass 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 autumn moor grass soil & potting-mix guide.
Compost for Autumn Moor Grass in the UK — frequently asked questions
What compost should I use for autumn moor grass in the UK?
Use peat-free multipurpose compost. Native to alkaline rocky hillsides and open woodlands. One of few ornamental grasses that actively thrives on chalk or limestone soils. Excellent for dry slopes, under-tree planting, or alkaline conditions that would defeat other grasses. 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 autumn moor grass?
Yes. A good peat-free multipurpose compost is exactly right for autumn moor grass. 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 autumn moor grass perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does autumn moor grass 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 autumn moor grass need?
Always a pot with drainage holes. Well-drained to dry, including chalky, stony, or poor soils; pH 6.0-8.5. 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 autumn moor grass care
See the full autumn moor grass care guide, its UK watering and UK hardiness.