Soil & potting mix
Best soil for Kangaroo Paw Fern (Microsorum diversifolium)
Also called Kangaroo paw fern, Kangaroo fern, Kangaroo foot fern.
More about kangaroo paw fern
About Kangaroo Paw Fern
Microsorum diversifolium · also called Kangaroo paw fern, Kangaroo fern · houseplant
The kangaroo paw fern is an easygoing Australasian epiphytic fern with glossy, leathery, lobed fronds spreading from a creeping surface rhizome. It thrives in bright-to-medium indirect light, evenly moist soil and average-to-high humidity, tolerating ordinary rooms better than fussier ferns. Microsorum is not individually listed by ASPCA, so treat as mildly toxic and verify with a vet.
Preferred mix: Rich, humusy, free-draining aroid/fern mix
Watch for — Brown, crispy frond tips or edges: Usually too-dry air, underwatering, or scorching direct sun. Raise humidity, keep the mix evenly moist, and move out of direct light.
Why kangaroo paw fern needs this mix
Kangaroo Paw Fern hates drying out, so it wants a mix that stays evenly moist — but it still needs perlite so "moist" never tips into "waterlogged".
- Kangaroo Paw Fern comes from damp, shaded forest floors and has fine roots that scorch and brown the moment the rootball dries — the mix has to hold a steady reserve.
- Coir and compost give that reserve, while perlite keeps enough air that the constantly-moist mix does not turn anaerobic.
- Even moisture also keeps its thin leaves from crisping at the edges, which is this plant’s most visible stress signal.
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 kangaroo paw fern struggles, and the damage often shows up weeks later as a watering problem. For this species specifically:
- A free-draining, gritty mix dries too fast for kangaroo paw fern — you get crispy brown edges and frond or leaf drop within days of one missed watering.
- A pure, airless peat mix swings the other way: it holds water but suffocates the fine roots and rots the crown.
- Letting the mix dry to the point it shrinks from the pot is very hard to re-wet evenly and stresses the plant badly.
Using a sharp, fast-draining "houseplant" or cactus-leaning mix that lets kangaroo paw fern dry out. It needs a moisture-retentive but still airy blend.
pH — does it matter for kangaroo paw fern?
Kangaroo Paw Fern prefers a slightly acidic mix (around pH 5.5-6.5); a peat-free compost-and-coir blend sits there naturally, so routine pH testing is unnecessary.
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
A good peat-free houseplant compost works for kangaroo paw fern straight from the bag if you mix in some perlite for air. The DIY ratio above gives a more reliable moisture-to-air balance.
Drainage and the pot
Use a pot with a drainage hole but a less-porous material (plastic or glazed) so it does not dry too fast. Bottom-watering keeps the mix evenly moist without sogging the crown.
Peat-free mixes slump and compact as they hold moisture, so refresh kangaroo paw fern's mix every 12-18 months to keep air in the rootball even if the pot size is unchanged. When the time comes, our repotting guide for kangaroo paw fern covers the timing and technique step by step.
Kangaroo Paw Fern soil — frequently asked questions
What is the best soil mix for kangaroo paw fern?
3 parts peat-free houseplant compost : 1 part coco coir : 1 part perlite. Kangaroo Paw Fern comes from damp, shaded forest floors and has fine roots that scorch and brown the moment the rootball dries — the mix has to hold a steady reserve.
Can I use normal potting soil for kangaroo paw fern?
A free-draining, gritty mix dries too fast for kangaroo paw fern — you get crispy brown edges and frond or leaf drop within days of one missed watering. A good peat-free houseplant compost works for kangaroo paw fern straight from the bag if you mix in some perlite for air. The DIY ratio above gives a more reliable moisture-to-air balance.
Does kangaroo paw fern need a special pH?
Kangaroo Paw Fern prefers a slightly acidic mix (around pH 5.5-6.5); a peat-free compost-and-coir blend sits there naturally, so routine pH testing is unnecessary.
Should I buy a bagged mix or make my own for kangaroo paw fern?
A good peat-free houseplant compost works for kangaroo paw fern straight from the bag if you mix in some perlite for air. The DIY ratio above gives a more reliable moisture-to-air balance.
How often should I refresh the soil for kangaroo paw fern?
Peat-free mixes slump and compact as they hold moisture, so refresh kangaroo paw fern's mix every 12-18 months to keep air in the rootball even if the pot size is unchanged. Use a pot with a drainage hole but a less-porous material (plastic or glazed) so it does not dry too fast. Bottom-watering keeps the mix evenly moist without sogging the crown.
Keep reading
- Kangaroo Paw Fern care — the full brief (light, water, humidity, problems, pet safety)
- How often to water kangaroo paw fern — the schedule the mix feeds into
- Repotting kangaroo paw fern — when and how to refresh the mix
- Soil pH guide — test it and adjust it safely
- Underwatered plant — signs and how to rehydrate it
- Why is my plant wilting? Wet vs dry diagnosis
- Should I water my plant? The simple check first
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- All 569 soil and potting-mix guides in the Growli library