Soil & potting mix
Best soil for Monstera (Monstera deliciosa)
Also called Swiss cheese plant, Mexican breadfruit, split-leaf philodendron.
About Monstera
Monstera deliciosa · also called Swiss cheese plant, Mexican breadfruit · tropical
Monstera is a climbing tropical aroid from Central American rainforests. Indoors it wants bright indirect light, chunky aroid mix, and a moss pole to develop its famous fenestrated leaves. Water when the top 2-3 cm of soil is dry. It is mildly toxic to cats and dogs because of insoluble calcium oxalates.
Monstera deliciosa is native to the tropical rainforests of southern Mexico through Central America to Panama, where it grows as a hemiepiphyte: it germinates on the floor then climbs tree trunks with aerial roots toward the canopy light.
RHS recommends a peat-free, loam-based potting compost; as a forest-floor climber it wants a chunky, free-draining mix rather than dense soil so its thick roots get air.
Preferred mix: Chunky aroid mix
Watch for — Yellow leaves: Almost always overwatering or root rot.
Sources: rhs.org.uk, missouribotanicalgarden.org, digitalcommons.usf.edu
Why monstera needs this mix
Monstera 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 monstera 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 monstera struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- Plain bagged compost packs tight around monstera'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. Monstera needs roughly half its volume as chunky, airy material — that single change fixes most "mystery decline".
pH — does it matter for monstera?
Monstera 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 monstera, 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 monstera 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 monstera covers the timing and technique step by step.
Monstera soil — frequently asked questions
What is the best soil mix for monstera?
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 monstera 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 monstera?
Plain bagged compost packs tight around monstera'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 monstera, 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 monstera need a special pH?
Monstera 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 monstera?
Bagged "aroid mix" is now widely sold and is a fine shortcut for monstera, 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 monstera?
Bark breaks down over time, so refresh the mix for monstera 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
- Monstera care — the full brief (light, water, humidity, problems, pet safety)
- How often to water monstera — the schedule the mix feeds into
- Repotting monstera — 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
- Best soil for pothos
- Best soil for fiddle leaf fig
- Best soil for philodendron
- All 200 soil and potting-mix guides in the Growli library