UK compost
What compost for philodendron selloum (tree philodendron) in the UK?
Philodendron bipinnatifidum (syn. Thaumatophyllum bipinnatifidum, P. selloum)
More about philodendron selloum (tree philodendron) in the UK
Which compost philodendron selloum (tree philodendron) needs
For philodendron selloum (tree philodendron) the mix to buy is peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Use a loam-based, peat-free potting compost that holds moisture yet drains fast. A good blend is roughly two parts quality houseplant compost to one part orchid bark or coco coir plus one part perlite, which mimics the airy, humus-rich forest floor. Aim for a slightly acidic to neutral pH; refresh or top-dress annually.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 philodendron selloum (tree philodendron) 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?
Philodendron Selloum (Tree Philodendron) 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 philodendron selloum (tree philodendron) soil & potting-mix guide.
Compost for Philodendron Selloum (Tree Philodendron) in the UK — frequently asked questions
What compost should I use for philodendron selloum (tree philodendron) in the UK?
Use peat-free multipurpose compost cut roughly half-and-half with horticultural grit or perlite. Use a loam-based, peat-free potting compost that holds moisture yet drains fast. A good blend is roughly two parts quality houseplant compost to one part orchid bark or coco coir plus one part perlite, which mimics the airy, humus-rich forest floor. Aim for a slightly acidic to neutral pH; refresh or top-dress annually. 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 philodendron selloum (tree philodendron)?
Not on its own — multipurpose compost holds too much water for philodendron selloum (tree philodendron) 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 philodendron selloum (tree philodendron) perfectly well — they dry a little faster at the surface, so check moisture by feel rather than by the look of the top.
Does philodendron selloum (tree philodendron) need grit or perlite added?
Yes — philodendron selloum (tree philodendron) 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 philodendron selloum (tree philodendron) need?
Always a pot with drainage holes. Rich, free-draining aroid mix. 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 philodendron selloum (tree philodendron) care
See the full philodendron selloum (tree philodendron) care guide, its UK watering and UK hardiness.