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Fertilising guide

How to fertilise Calathea 'Flamestar' (Goeppertia veitchiana 'Flamestar')— schedule & NPK

Also called Calathea Flamestar, Flamestar prayer plant, Flamestar calathea, Goeppertia 'Flamestar'.

More about calathea 'flamestar'

About Calathea 'Flamestar'

Goeppertia veitchiana 'Flamestar' · also called Calathea Flamestar, Flamestar prayer plant · houseplant

Calathea 'Flamestar' is a striking prayer plant (Marantaceae) with patterned, feathery green leaves that fold up at night. It wants bright indirect light, evenly moist soil, filtered or rainwater, warmth and high humidity above 50-60%. ASPCA-listed as non-toxic to cats and dogs, making it a pet-safe choice.

Growth habit: Clump-forming, upright evergreen perennial grown from rhizomes. A moderate-to-fast grower in good conditions, it sends up new leaves on long stalks through spring and summer. The patterned leaves rise and fold at night (nyctinasty) and lower again by day, the classic prayer-plant movement.

Watch for — Brown, crispy leaf edges and tips: Usually low humidity and/or minerals (chlorine, fluoride, salts) in tap water. Raise humidity above 50-60% and switch to distilled, filtered or rainwater.

What fertiliser calathea 'flamestar' actually wants — and why

Calathea 'Flamestar' 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 'flamestar': 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 'flamestar', 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 'flamestar':

Feed every 4-6 weeks during the spring and summer growing season with a balanced liquid houseplant fertiliser diluted to a quarter or half strength to avoid fertiliser burn and salt build-up. Stop feeding in autumn and winter when growth slows. Flush the soil occasionally to clear accumulated salts. Treat that as every 4-6 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 'flamestar' 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 'flamestar'

Half strength is the safe default for calathea 'flamestar' — 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 'flamestar' first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the calathea 'flamestar' watering schedule.

Signs you are over-feeding calathea 'flamestar'

Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for calathea 'flamestar':

Signs you are under-feeding calathea 'flamestar'

If the symptoms point at watering, light or roots rather than nutrition, the full calathea 'flamestar' care brief covers soil, humidity and the common problems for this species.

Flushing and leaching the salts

Flush the pot of calathea 'flamestar' 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 'flamestar'

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 'flamestar' — frequently asked questions

What fertiliser does calathea 'flamestar' 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 'Flamestar' 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 'flamestar'?

Feed every 4-6 weeks during the spring and summer growing season with a balanced liquid houseplant fertiliser diluted to a quarter or half strength to avoid fertiliser burn and salt build-up. Stop feeding in autumn and winter when growth slows. Flush the soil occasionally to clear accumulated salts. Feed every 4-6 weeks during the spring and summer growing season with a balanced liquid houseplant fertiliser diluted to a quarter or half strength to avoid fertiliser burn and salt build-up. Stop feeding in autumn and winter when growth slows. Flush the soil occasionally to clear accumulated salts. Treat that as every 4-6 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 'flamestar'?

Half strength is the safe default for calathea 'flamestar' — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.

What does over-feeding calathea 'flamestar' 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 'flamestar' 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 'flamestar'?

Flush the pot of calathea 'flamestar' 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.

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