Soil & potting mix
Best soil for Eternal Flame Plant (Goeppertia crocata)
Also called Eternal Flame Plant, Eternal Flame Calathea, Saffron-coloured Calathea, Calathea crocata, Tassmania.
More about eternal flame plant
About Eternal Flame Plant
Goeppertia crocata · also called Eternal Flame Plant, Eternal Flame Calathea · flowering
The Eternal Flame Plant (Goeppertia crocata, formerly Calathea crocata) is a tropical Marantaceae houseplant prized for upright orange flame-like bracts that last two to three months. Grow it in bright indirect light with high humidity, evenly moist filtered water, and warmth. It is pet-safe: ASPCA lists the Calathea genus as non-toxic to cats and dogs.
Preferred mix: Light, well-draining, peat-based aroid/houseplant mix
Watch for — Curling, fading, or limp leaves: Typically underwatering, dry air, or too much direct sun. Keep the soil evenly moist, increase humidity, and move it out of harsh light.
Why eternal flame plant needs this mix
Eternal Flame Plant hates drying out, so it wants a mix that stays evenly moist — but it still needs perlite so "moist" never tips into "waterlogged".
- Eternal Flame Plant 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 eternal flame plant 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 eternal flame plant — 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 eternal flame plant dry out. It needs a moisture-retentive but still airy blend.
pH — does it matter for eternal flame plant?
Eternal Flame Plant 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 eternal flame plant 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 eternal flame plant'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 eternal flame plant covers the timing and technique step by step.
Eternal Flame Plant soil — frequently asked questions
What is the best soil mix for eternal flame plant?
3 parts peat-free houseplant compost : 1 part coco coir : 1 part perlite. Eternal Flame Plant 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 eternal flame plant?
A free-draining, gritty mix dries too fast for eternal flame plant — you get crispy brown edges and frond or leaf drop within days of one missed watering. A good peat-free houseplant compost works for eternal flame plant 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 eternal flame plant need a special pH?
Eternal Flame Plant 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 eternal flame plant?
A good peat-free houseplant compost works for eternal flame plant 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 eternal flame plant?
Peat-free mixes slump and compact as they hold moisture, so refresh eternal flame plant'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
- Eternal Flame Plant care — the full brief (light, water, humidity, problems, pet safety)
- How often to water eternal flame plant — the schedule the mix feeds into
- Repotting eternal flame plant — 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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