UK compost
What compost for impatiens hawkeri 'sunpatiens spreading white' in the UK?
Impatiens hawkeri 'SunPatiens Spreading White'
More about impatiens hawkeri 'sunpatiens spreading white' in the UK
Which compost impatiens hawkeri 'sunpatiens spreading white' needs
For impatiens hawkeri 'sunpatiens spreading white' the mix to buy is peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. A fertile, humus-rich soil or good peat-free compost suits it. Free drainage prevents root rot, while plenty of organic matter retains the steady moisture this vigorous, fast-spreading plant demands.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 impatiens hawkeri 'sunpatiens spreading white' 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?
Impatiens hawkeri 'SunPatiens Spreading White' 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 impatiens hawkeri 'sunpatiens spreading white' soil & potting-mix guide.
Compost for Impatiens hawkeri 'SunPatiens Spreading White' in the UK — frequently asked questions
What compost should I use for impatiens hawkeri 'sunpatiens spreading white' in the UK?
Use peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. A fertile, humus-rich soil or good peat-free compost suits it. Free drainage prevents root rot, while plenty of organic matter retains the steady moisture this vigorous, fast-spreading plant demands. 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 impatiens hawkeri 'sunpatiens spreading white'?
Not on its own — multipurpose compost holds too much water for impatiens hawkeri 'sunpatiens spreading white' 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 impatiens hawkeri 'sunpatiens spreading white' perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does impatiens hawkeri 'sunpatiens spreading white' need grit or perlite added?
Yes — impatiens hawkeri 'sunpatiens spreading white' 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 impatiens hawkeri 'sunpatiens spreading white' need?
Always a pot with drainage holes. Rich, moisture-retentive but well-drained soil. 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 impatiens hawkeri 'sunpatiens spreading white' care
See the full impatiens hawkeri 'sunpatiens spreading white' care guide, its UK watering and UK hardiness.