UK compost
What compost for annual baby's breath in the UK?
Gypsophila elegans
More about annual baby's breath in the UK
Which compost annual baby's breath needs
For annual baby's breath the mix to buy is peat-free ericaceous (lime-free) compost. The genus name Gypsophila means 'chalk-loving' — these plants are native to calcareous, stony soils with pH 7.0–8.5. Heavy clay or acidic soils are unsuitable. Work lime into acidic soils before sowing. Excellent drainage is critical; waterlogged roots rapidly rot.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 annual baby's breath 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?
Annual baby's breath is a lime-hater: it needs an acidic, lime-free ericaceous compost. In ordinary (limey) multipurpose it slowly yellows between the leaf veins as it locks out iron. Buy a bag labelled "ericaceous", and in a hard-water area water with rainwater where you can, since tap water is slightly alkaline.
For the full recipe, pH and drainage detail (US wording), see the annual baby's breath soil & potting-mix guide.
Compost for Annual baby's breath in the UK — frequently asked questions
What compost should I use for annual baby's breath in the UK?
Use peat-free ericaceous (lime-free) compost. The genus name Gypsophila means 'chalk-loving' — these plants are native to calcareous, stony soils with pH 7.0–8.5. Heavy clay or acidic soils are unsuitable. Work lime into acidic soils before sowing. Excellent drainage is critical; waterlogged roots rapidly rot. 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 annual baby's breath?
No — annual baby's breath needs an acidic, lime-free (ericaceous) compost. Standard multipurpose is too limey and will slowly cause yellowing between the leaf veins (lime-induced chlorosis). Buy a bag labelled "ericaceous".
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 annual baby's breath perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does annual baby's breath 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 annual baby's breath need?
Always a pot with drainage holes. Light, gritty or sandy, alkaline to neutral, very well-drained. 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 annual baby's breath care
See the full annual baby's breath care guide, its UK watering and UK hardiness.