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Fertilising guide

How to fertilise Cat's Claw Vine (Macfadyena unguis-cati)— schedule & NPK

Also called Cat's Claw Creeper, Yellow Trumpet Vine, Funnel Creeper.

More about cat's claw vine

About Cat's Claw Vine

Macfadyena unguis-cati · also called Cat's Claw Creeper, Yellow Trumpet Vine · tropical

Cat's Claw Vine is a vigorous evergreen climber from tropical America, armed with hook-like tendrils that allow it to grip almost any surface. It produces a spectacular display of bright yellow trumpet flowers in spring. Listed as a serious invasive weed in Australia, South Africa, and parts of the USA — rarely recommended for new plantings.

Growth habit: Extremely vigorous evergreen tendril-climbing woody vine with tuberous roots

What fertiliser cat's claw vine actually wants — and why

Cat's Claw Vine 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 cat's claw vine: 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 cat's claw vine, 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 cat's claw vine:

Fertilising is not recommended and will promote excessive, hard-to-control growth. This plant thrives in infertile conditions and does not need feeding. Treat that as sparingly through the growing season 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 cat's claw vine 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 cat's claw vine

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

Signs you are over-feeding cat's claw vine

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

Signs you are under-feeding cat's claw vine

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

Flushing and leaching the salts

Flush the pot of cat's claw vine 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 cat's claw vine

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 cat's claw vine — frequently asked questions

What fertiliser does cat's claw vine 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. Cat's Claw Vine 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 cat's claw vine?

Fertilising is not recommended and will promote excessive, hard-to-control growth. This plant thrives in infertile conditions and does not need feeding. Fertilising is not recommended and will promote excessive, hard-to-control growth. This plant thrives in infertile conditions and does not need feeding. Treat that as sparingly through the growing season 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 cat's claw vine?

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

What does over-feeding cat's claw vine 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 cat's claw vine 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 cat's claw vine?

Flush the pot of cat's claw vine 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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