UK compost
What compost for eastern red cedar in the UK?
Juniperus virginiana
More about eastern red cedar in the UK
Which compost eastern red cedar needs
For eastern red cedar the mix to buy is peat-free ericaceous (lime-free) compost. One of the most soil-tolerant conifers available, growing in dry chalk and limestone outcrops, heavy clay, poor sandy soils, and loam, provided drainage is reasonable. Tolerates pH 4.5–8.0. Thrives where most other conifers fail, including dry rocky hillsides and exposed alkaline slopes.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 eastern red cedar 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?
Eastern Red Cedar 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 eastern red cedar soil & potting-mix guide.
Compost for Eastern Red Cedar in the UK — frequently asked questions
What compost should I use for eastern red cedar in the UK?
Use peat-free ericaceous (lime-free) compost. One of the most soil-tolerant conifers available, growing in dry chalk and limestone outcrops, heavy clay, poor sandy soils, and loam, provided drainage is reasonable. Tolerates pH 4.5–8.0. Thrives where most other conifers fail, including dry rocky hillsides and exposed alkaline slopes. 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 eastern red cedar?
No — eastern red cedar 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 eastern red cedar perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does eastern red cedar 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 eastern red cedar need?
Always a pot with drainage holes. Well-drained, dry to moist; chalk, clay, sand, loam, or rocky 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 eastern red cedar care
See the full eastern red cedar care guide, its UK watering and UK hardiness.