UK compost
What compost for arisaema consanguineum in the UK?
Arisaema consanguineum
More about arisaema consanguineum in the UK
Which compost arisaema consanguineum needs
For arisaema consanguineum the mix to buy is peat-free multipurpose compost. Enrich with leaf mould and compost; add grit for drainage. Slightly acidic to neutral. The tall stem benefits from a sheltered spot in deep, fertile soil where the tuber can sit dry but not waterlogged in dormancy.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 arisaema consanguineum 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?
Arisaema consanguineum 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 arisaema consanguineum soil & potting-mix guide.
Compost for Arisaema consanguineum in the UK — frequently asked questions
What compost should I use for arisaema consanguineum in the UK?
Use peat-free multipurpose compost. Enrich with leaf mould and compost; add grit for drainage. Slightly acidic to neutral. The tall stem benefits from a sheltered spot in deep, fertile soil where the tuber can sit dry but not waterlogged in dormancy. 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 arisaema consanguineum?
Yes. A good peat-free multipurpose compost is exactly right for arisaema consanguineum. 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 arisaema consanguineum perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does arisaema consanguineum 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 arisaema consanguineum need?
Always a pot with drainage holes. Deep, humus-rich, moisture-retentive but well-drained loam. 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 arisaema consanguineum care
See the full arisaema consanguineum care guide, its UK watering and UK hardiness.