Fertilising guide
How to fertilise Calathea orbifolia (Goeppertia orbifolia (syn. Calathea orbifolia))— schedule & NPK
Also called Round-leaved calathea, Orbifolia prayer plant, Calathea orbifolia.
More about calathea orbifolia
About Calathea orbifolia
Goeppertia orbifolia (syn. Calathea orbifolia) · also called Round-leaved calathea, Orbifolia prayer plant · tropical
Calathea orbifolia is a Bolivian rainforest perennial in the prayer-plant family, prized for large, near-round leaves striped silvery-blue and green. Its defining care need is steady moisture without sogginess, paired with high humidity and filtered or rainwater, as it is intolerant of the fluoride and chlorine in ordinary tap water.
Growth habit: A clump-forming, rhizomatous evergreen perennial that spreads from underground rhizomes, sending up long-stalked, broadly oval leaves. Like other prayer plants it shows nyctinasty, folding its leaves upward at night and lowering them by day.
Watch for — Brown, crispy leaf edges: Most often caused by tap-water fluoride and chlorine, low humidity, or salt build-up from over-feeding. Switch to rainwater, distilled or filtered water, raise humidity toward 60%, and flush the compost periodically.
What fertiliser calathea orbifolia actually wants — and why
Calathea orbifolia is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula.
For the language behind the three numbers on the bottle — what nitrogen, phosphorus and potassium each do — see the NPK ratio explained entry. The short version for calathea orbifolia: match the feed to the job the plant is doing right now, not to a generic “plant food” on the shelf.
How often to feed calathea orbifolia, and which months
Feeding only earns its keep while the plant is in active growth and can use the nutrients — pour feed into a dormant or low-light plant and it simply builds up as root-burning salt. For calathea orbifolia:
Feed every 2-4 weeks through spring and summer with a balanced liquid houseplant fertiliser diluted to about half strength. Withhold feed in autumn and winter when growth pauses. Over-feeding causes salt build-up and leaf-edge burn, so flush the compost occasionally with clean water. Treat that as every 2-4 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
The dormant-season rule matters more than the exact interval: skip feeding entirely when calathea orbifolia is resting. For the wider context on indoor feeding rhythms across the seasons, the houseplant fertiliser schedule walks through the year month by month.
What strength to mix for calathea orbifolia
Half strength is the safe default for calathea orbifolia — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
Feeding always goes onto already-damp soil, never dry roots — water calathea orbifolia first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the calathea orbifolia watering schedule.
Signs you are over-feeding calathea orbifolia
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for calathea orbifolia:
- Brown, crispy leaf tips and edges with no sign of underwatering.
- A white, crusty salt deposit on the soil surface or pot rim.
- Weak, pale, stretched new growth that flops.
- Lower leaves yellow and drop while the soil is correctly watered.
Signs you are under-feeding calathea orbifolia
- Uniformly pale or yellow-green leaves, oldest first.
- Noticeably small new leaves and stalled growth in good light and season.
- A generally tired, lacklustre look despite correct watering and light.
If the symptoms point at watering, light or roots rather than nutrition, the full calathea orbifolia care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of calathea orbifolia with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Organic vs synthetic feeds for calathea orbifolia
Organic options
A diluted seaweed or worm-casting feed, or fish emulsion if you can tolerate the smell indoors. UK: Westland or Baby Bio Organic, dilute seaweed; US: Espoma Indoor! or Neptune's Harvest fish & seaweed. Slow, gentle and hard to overdo.
Synthetic / liquid feeds
A general-purpose houseplant liquid at half strength — UK: Baby Bio, Westland Houseplant Feed or Phostrogen; US: Miracle-Gro Indoor Plant Food or Schultz. Convenient and fast-acting; the only risk is overdoing it.
Brand names are examples, not endorsements, and UK and US ranges differ — check the label’s own NPK and dilution rate, since formulations change.
Fertilising calathea orbifolia — frequently asked questions
What fertiliser does calathea orbifolia need?
A balanced general houseplant feed (roughly even N-P-K) is exactly right — it is grown for foliage, so steady, moderate nitrogen for healthy leaves is the goal, not a bloom or root formula. Calathea orbifolia is an easy, light foliage feeder — a half-strength balanced liquid feed through the growing months keeps it green without forcing weak, sappy growth.
How often should I feed calathea orbifolia?
Feed every 2-4 weeks through spring and summer with a balanced liquid houseplant fertiliser diluted to about half strength. Withhold feed in autumn and winter when growth pauses. Over-feeding causes salt build-up and leaf-edge burn, so flush the compost occasionally with clean water. Feed every 2-4 weeks through spring and summer with a balanced liquid houseplant fertiliser diluted to about half strength. Withhold feed in autumn and winter when growth pauses. Over-feeding causes salt build-up and leaf-edge burn, so flush the compost occasionally with clean water. Treat that as every 2-4 weeks between spring through early autumn (roughly March to September); ease off in autumn and stop entirely in the low light of winter.
What strength of feed for calathea orbifolia?
Half strength is the safe default for calathea orbifolia — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding calathea orbifolia look like?
Brown, crispy leaf tips and edges with no sign of underwatering. A white, crusty salt deposit on the soil surface or pot rim. Weak, pale, stretched new growth that flops. Lower leaves yellow and drop while the soil is correctly watered. Feeding calathea orbifolia year-round on a fixed schedule, including dark winter months, is the most common mistake — it cannot use the nutrients in low light and the surplus simply burns the roots and crusts the soil.
Should I flush the soil of calathea orbifolia?
Flush the pot of calathea orbifolia with plain water until it runs freely from the base every couple of months in the feeding season — it washes out the fertiliser salts that cause brown tips.
Keep reading
- Calathea orbifolia care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water calathea orbifolia — the watering schedule
- The houseplant fertiliser schedule — feeding through the year
- NPK ratio explained — what the three numbers on the bottle mean
- How to fertilise monstera
- How to fertilise pothos
- How to fertilise fiddle leaf fig
- All 271 fertilising guides in the Growli library