Growli
Let's go

Fertilising guide

How to fertilise Forget's Anthurium (Anthurium forgetii)— schedule & NPK

Also called Forget's Anthurium, Forget's Flamingo Flower, Round-leaf Anthurium.

More about forget's anthurium

About Forget's Anthurium

Anthurium forgetii · also called Forget's Anthurium, Forget's Flamingo Flower · houseplant

Forget's Anthurium is a compact Colombian aroid prized for round, velvety peltate leaves with no sinus and frosted silver-white veining. Grow it in bright indirect light, a chunky bark mix kept lightly moist, and high humidity above 60%. The ASPCA lists Anthurium as toxic to cats and dogs, so site it out of reach.

Growth habit: Slow-growing, upright clumping epiphytic herbaceous perennial. Its signature feature is round-to-elliptic peltate (shield-shaped) leaves with the petiole attached centrally and no open sinus, deep velvety green overlaid with pale, often frosted-white veining. It typically pushes only 1-2 new leaves per year.

Watch for — Brown, crispy leaf edges: Almost always humidity too low (below ~60%) or mineral/salt buildup from hard water or over-fertilising. Raise humidity, flush the substrate, and consider filtered or rainwater.

What fertiliser forget's anthurium actually wants — and why

Forget's Anthurium 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 forget's anthurium: 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 forget's anthurium, 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 forget's anthurium:

Feed lightly during active growth (spring to early autumn) with a balanced or orchid-formulated liquid fertiliser diluted to roughly half strength, about every 4-8 weeks. Less is more: this slow grower is sensitive to salt buildup, so flush the substrate periodically and stop feeding in winter. Treat that as every 4-8 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 forget's anthurium 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 forget's anthurium

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

Signs you are over-feeding forget's anthurium

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

Signs you are under-feeding forget's anthurium

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

Flushing and leaching the salts

Flush the pot of forget's anthurium 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 forget's anthurium

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 forget's anthurium — frequently asked questions

What fertiliser does forget's anthurium 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. Forget's Anthurium 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 forget's anthurium?

Feed lightly during active growth (spring to early autumn) with a balanced or orchid-formulated liquid fertiliser diluted to roughly half strength, about every 4-8 weeks. Less is more: this slow grower is sensitive to salt buildup, so flush the substrate periodically and stop feeding in winter. Feed lightly during active growth (spring to early autumn) with a balanced or orchid-formulated liquid fertiliser diluted to roughly half strength, about every 4-8 weeks. Less is more: this slow grower is sensitive to salt buildup, so flush the substrate periodically and stop feeding in winter. Treat that as every 4-8 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 forget's anthurium?

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

What does over-feeding forget's anthurium 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 forget's anthurium 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 forget's anthurium?

Flush the pot of forget's anthurium 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