Soil & potting mix
Best soil for Calathea Concinna (Goeppertia concinna)
Also called Freddie calathea.
More about calathea concinna
About Calathea Concinna
Goeppertia concinna · also called Freddie calathea · houseplant
Calathea Concinna (Goeppertia concinna), widely sold as 'Freddie', is a graceful prayer plant with slender, wavy pale-green leaves feathered with alternating dark-green herringbone bars. Fast-growing and relatively forgiving, it is pet-safe and forms a full, fountaining clump given warmth, moderate-to-high humidity, and mineral-free water.
Preferred mix: Light, moisture-retentive, well-draining mix
Watch for — Sudden wilting: The thin leaves collapse fast when the soil dries; water promptly and keep the mix evenly moist.
Why calathea concinna needs this mix
Calathea Concinna hates drying out, so it wants a mix that stays evenly moist — but it still needs perlite so "moist" never tips into "waterlogged".
- Calathea Concinna 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 calathea concinna 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 calathea concinna — 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 calathea concinna dry out. It needs a moisture-retentive but still airy blend.
pH — does it matter for calathea concinna?
Calathea Concinna 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 calathea concinna 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 calathea concinna'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 calathea concinna covers the timing and technique step by step.
Calathea Concinna soil — frequently asked questions
What is the best soil mix for calathea concinna?
3 parts peat-free houseplant compost : 1 part coco coir : 1 part perlite. Calathea Concinna 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 calathea concinna?
A free-draining, gritty mix dries too fast for calathea concinna — you get crispy brown edges and frond or leaf drop within days of one missed watering. A good peat-free houseplant compost works for calathea concinna 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 calathea concinna need a special pH?
Calathea Concinna 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 calathea concinna?
A good peat-free houseplant compost works for calathea concinna 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 calathea concinna?
Peat-free mixes slump and compact as they hold moisture, so refresh calathea concinna'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
- Calathea Concinna care — the full brief (light, water, humidity, problems, pet safety)
- How often to water calathea concinna — the schedule the mix feeds into
- Repotting calathea concinna — 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 2464 soil and potting-mix guides in the Growli library