UK compost
What compost for white periwinkle in the UK?
Vinca minor 'Alba'
More about white periwinkle in the UK
Which compost white periwinkle needs
For white periwinkle the mix to buy is peat-free multipurpose compost. As with the species, tolerates a wide range of soil types at pH 6.0–8.0. Best performance in humus-rich, well-draining loam. Copes with root competition under trees better than most groundcovers. Avoid consistently waterlogged positions.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 white periwinkle 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?
White Periwinkle 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 white periwinkle soil & potting-mix guide.
Compost for White Periwinkle in the UK — frequently asked questions
What compost should I use for white periwinkle in the UK?
Use peat-free multipurpose compost. As with the species, tolerates a wide range of soil types at pH 6.0–8.0. Best performance in humus-rich, well-draining loam. Copes with root competition under trees better than most groundcovers. Avoid consistently waterlogged positions. 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 white periwinkle?
Yes. A good peat-free multipurpose compost is exactly right for white periwinkle. 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 white periwinkle perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does white periwinkle 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 white periwinkle need?
Always a pot with drainage holes. Well-draining loam to clay-loam; highly adaptable. 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 white periwinkle care
See the full white periwinkle care guide, its UK watering and UK hardiness.