Fertilising guide
How to fertilise Pinstripe Calathea (Goeppertia ornata)— schedule & NPK
Also called Pinstripe Calathea, Pinstripe Plant, Pin-Stripe Prayer Plant, Calathea ornata.
More about pinstripe calathea
About Pinstripe Calathea
Goeppertia ornata · also called Pinstripe Calathea, Pinstripe Plant · houseplant
The Pinstripe Calathea (Goeppertia ornata) is a tropical prayer plant prized for dark leaves striped fine pink, with purple undersides that fold up at night. It wants bright indirect light, consistently moist soil watered with distilled or filtered water, and high humidity. The ASPCA lists Calathea as non-toxic to cats and dogs.
Growth habit: Clump-forming, rhizomatous foliage plant with an upright, fountain-like rosette of long oval leaves. A nyctinastic "prayer plant" — leaves rise and fold upward at night, then lower by day. A relatively slow grower.
Watch for — Brown, crispy leaf edges and tips: Usually from minerals (fluoride, chlorine, salts) in tap water, low humidity, or fertiliser buildup. Switch to distilled, rain, or filtered water, raise humidity above 50%, and ease off feeding.
What fertiliser pinstripe calathea actually wants — and why
Pinstripe Calathea 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 pinstripe calathea: 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 pinstripe calathea, 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 pinstripe calathea:
Feed monthly during spring and summer with a balanced houseplant fertiliser diluted to half strength. Calatheas are light feeders and salt-sensitive, so over-fertilising causes leaf burn and brown tips. Stop feeding in autumn and winter when growth naturally slows. Treat that as monthly 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 pinstripe calathea 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 pinstripe calathea
Half strength is the safe default for pinstripe calathea — 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 pinstripe calathea first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the pinstripe calathea watering schedule.
Signs you are over-feeding pinstripe calathea
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for pinstripe calathea:
- 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 pinstripe calathea
- 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 pinstripe calathea care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of pinstripe calathea 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 pinstripe calathea
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 pinstripe calathea — frequently asked questions
What fertiliser does pinstripe calathea 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. Pinstripe Calathea 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 pinstripe calathea?
Feed monthly during spring and summer with a balanced houseplant fertiliser diluted to half strength. Calatheas are light feeders and salt-sensitive, so over-fertilising causes leaf burn and brown tips. Stop feeding in autumn and winter when growth naturally slows. Feed monthly during spring and summer with a balanced houseplant fertiliser diluted to half strength. Calatheas are light feeders and salt-sensitive, so over-fertilising causes leaf burn and brown tips. Stop feeding in autumn and winter when growth naturally slows. Treat that as monthly 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 pinstripe calathea?
Half strength is the safe default for pinstripe calathea — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding pinstripe calathea 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 pinstripe calathea 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 pinstripe calathea?
Flush the pot of pinstripe calathea 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
- Pinstripe Calathea care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water pinstripe calathea — 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 snake plant
- How to fertilise dracaena
- How to fertilise peperomia
- All 389 fertilising guides in the Growli library