UK compost
What compost for pelargonium 'chocolate mint' in the UK?
Pelargonium 'Chocolate Mint'
More about pelargonium 'chocolate mint' in the UK
Which compost pelargonium 'chocolate mint' needs
For pelargonium 'chocolate mint' the mix to buy is peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. A peat-free compost with grit for drainage but enough body to hold gentle moisture, reflecting its peppermint-geranium ancestry. Avoid pure sandy mixes that dry out too fast or heavy mixes that stay soggy.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 pelargonium 'chocolate mint' 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?
Pelargonium 'Chocolate Mint' 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 pelargonium 'chocolate mint' soil & potting-mix guide.
Compost for Pelargonium 'Chocolate Mint' in the UK — frequently asked questions
What compost should I use for pelargonium 'chocolate mint' in the UK?
Use peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. A peat-free compost with grit for drainage but enough body to hold gentle moisture, reflecting its peppermint-geranium ancestry. Avoid pure sandy mixes that dry out too fast or heavy mixes that stay soggy. 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 pelargonium 'chocolate mint'?
Not on its own — multipurpose compost holds too much water for pelargonium 'chocolate mint' 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 pelargonium 'chocolate mint' perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does pelargonium 'chocolate mint' need grit or perlite added?
Yes — pelargonium 'chocolate mint' 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 pelargonium 'chocolate mint' need?
Always a pot with drainage holes. Free-draining but moisture-retentive loam or potting mix with grit. 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 pelargonium 'chocolate mint' care
See the full pelargonium 'chocolate mint' care guide, its UK watering and UK hardiness.