Soil & potting mix
Best soil for Philodendron Andreanum (Philodendron andreanum)
Also called Andreanum, Black-Gold Velvet Philodendron.
More about philodendron andreanum
About Philodendron Andreanum
Philodendron andreanum · also called Andreanum, Black-Gold Velvet Philodendron · houseplant
Philodendron andreanum, often sold under the melanochrysum complex, is a velvet-leaved climber prized for elongated, dark blackish-green leaves with pale gold-bronze veins and a soft matte sheen. New leaves emerge smaller and bronze, lengthening dramatically with maturity on a moss pole. It needs warmth, high humidity and bright indirect light.
Preferred mix: Chunky, airy aroid mix
Watch for — Root rot: A dense or overwatered mix rots the fine roots. Use a chunky, airy aroid blend and let the surface dry slightly between waterings.
Why philodendron andreanum needs this mix
Philodendron Andreanum is a climbing rainforest aroid — it wants a chunky, bark-heavy mix full of air pockets, not a dense soil that packs around its thick roots.
- In the wild philodendron andreanum climbs trees with thick, partly aerial roots that expect air as much as moisture — bark and perlite recreate that open structure.
- A chunky mix drains fast but the coir and compost still hold a steady reservoir between waterings, which suits its "moist then slightly dry" rhythm.
- The big air gaps stop the dense, fast-growing root mass from compacting and choking itself.
For the full picture on what makes up a good mix, see our guide to the main types of soil and potting media — it explains why each ingredient above behaves the way it does.
What goes wrong with the wrong mix
The wrong soil is one of the most common reasons philodendron andreanum struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Plain bagged compost packs tight around philodendron andreanum's thick roots, holds water in the centre and triggers the yellow-leaf-then-mushy-stem rot pattern.
- A fine, peaty mix with no bark leaves the roots gasping — growth slows and new leaves come out small and without fenestration.
- Too much moss or water-retaining additive keeps the core permanently wet and invites fungus gnats.
Using ordinary potting soil with no bark or perlite. Philodendron Andreanum needs roughly half its volume as chunky, airy material — that single change fixes most "mystery decline".
pH — does it matter for philodendron andreanum?
Philodendron Andreanum prefers a slightly acidic mix, around pH 5.5-6.5, which a peat-free compost-and-bark blend lands on naturally. It is not fussy enough to need testing in practice.
If you want to check or adjust it, the soil pH guide walks through testing and the safe ways to nudge a mix more acidic or more alkaline.
DIY mix vs a bagged one
Bagged "aroid mix" is now widely sold and is a fine shortcut for philodendron andreanum, but check it actually contains visible bark and perlite — many are just rebranded compost. Mixing your own from the ratio above guarantees the structure.
Drainage and the pot
Any pot with a drainage hole works because the chunky mix does the draining. A pot only a little larger than the rootball avoids a wet, unused core; add a moss pole and the climbing roots will thank you.
Bark breaks down over time, so refresh the mix for philodendron andreanum every 12-18 months even if the pot size is still fine — spent, sludgy bark is a common hidden cause of decline. When the time comes, our repotting guide for philodendron andreanum covers the timing and technique step by step.
Philodendron Andreanum soil — frequently asked questions
What is the best soil mix for philodendron andreanum?
2 parts peat-free houseplant compost or coco coir : 2 parts orchid bark (fine-medium) : 1 part perlite : 1 part horticultural charcoal. In the wild philodendron andreanum climbs trees with thick, partly aerial roots that expect air as much as moisture — bark and perlite recreate that open structure.
Can I use normal potting soil for philodendron andreanum?
Plain bagged compost packs tight around philodendron andreanum's thick roots, holds water in the centre and triggers the yellow-leaf-then-mushy-stem rot pattern. Bagged "aroid mix" is now widely sold and is a fine shortcut for philodendron andreanum, but check it actually contains visible bark and perlite — many are just rebranded compost. Mixing your own from the ratio above guarantees the structure.
Does philodendron andreanum need a special pH?
Philodendron Andreanum prefers a slightly acidic mix, around pH 5.5-6.5, which a peat-free compost-and-bark blend lands on naturally. It is not fussy enough to need testing in practice.
Should I buy a bagged mix or make my own for philodendron andreanum?
Bagged "aroid mix" is now widely sold and is a fine shortcut for philodendron andreanum, but check it actually contains visible bark and perlite — many are just rebranded compost. Mixing your own from the ratio above guarantees the structure.
How often should I refresh the soil for philodendron andreanum?
Bark breaks down over time, so refresh the mix for philodendron andreanum every 12-18 months even if the pot size is still fine — spent, sludgy bark is a common hidden cause of decline. Any pot with a drainage hole works because the chunky mix does the draining. A pot only a little larger than the rootball avoids a wet, unused core; add a moss pole and the climbing roots will thank you.
Keep reading
- Philodendron Andreanum care — the full brief (light, water, humidity, problems, pet safety)
- How often to water philodendron andreanum — the schedule the mix feeds into
- Repotting philodendron andreanum — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Root rot — how the wrong soil starts it, and how to save the plant
- Overwatered plant — signs and recovery
- Should I water my plant? The simple check first
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- All 2464 soil and potting-mix guides in the Growli library