Soil & potting mix
Best soil for Ring Fern (Paesia scaberula)
Also called Ring Fern, Scented Fern, Lace Fern, Scented Lace Fern.
More about ring fern
About Ring Fern
Paesia scaberula · also called Ring Fern, Scented Fern · houseplant
Paesia scaberula is a fast-growing, deciduous, rhizomatous fern native to New Zealand, where it colonises open, dry, rocky cliff faces and disturbed ground. It produces elegantly lacy, finely divided fronds up to 1 m tall on dark, rough stalks, and releases a pleasant aromatic scent when the foliage is crushed or wetted by rain. The key care fact is that it tolerates drier, sunnier conditions than most ferns, spreading energetically by long-creeping rhizomes that require containment in smaller gardens. Not listed in the ASPCA database; treat as mildly-toxic to pets as a precaution.
Preferred mix: Moist but well-drained, humus-rich soil; tolerates clay, loam, sand, and chalk
Why ring fern needs this mix
Ring Fern hates drying out, so it wants a mix that stays evenly moist — but it still needs perlite so "moist" never tips into "waterlogged".
- Ring 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 ring 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 ring 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 ring fern dry out. It needs a moisture-retentive but still airy blend.
pH — does it matter for ring fern?
Ring 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 ring 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 ring 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 ring fern covers the timing and technique step by step.
Ring Fern soil — frequently asked questions
What is the best soil mix for ring fern?
3 parts peat-free houseplant compost : 1 part coco coir : 1 part perlite. Ring 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 ring fern?
A free-draining, gritty mix dries too fast for ring 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 ring 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 ring fern need a special pH?
Ring 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 ring fern?
A good peat-free houseplant compost works for ring 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 ring fern?
Peat-free mixes slump and compact as they hold moisture, so refresh ring 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
- Ring Fern care — the full brief (light, water, humidity, problems, pet safety)
- How often to water ring fern — the schedule the mix feeds into
- Repotting ring 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
- Best soil for peperomia deppeana
- Best soil for peperomia pereskiifolia
- Best soil for peperomia velutina
- All 10153 soil and potting-mix guides in the Growli library