Fertilising guide
How to fertilise Rabbit's foot fern (Davallia fejeensis)— schedule & NPK
Also called Rabbit's foot fern, Dainty rabbit's-foot fern, Fijian hare's foot fern, Lacy hare's foot, Lacy paw.
More about rabbit's foot fern
About Rabbit's foot fern
Davallia fejeensis · also called Rabbit's foot fern, Dainty rabbit's-foot fern · houseplant
The rabbit's foot fern is a delicate epiphytic fern from Fiji, prized for its lacy, finely divided fronds and the furry, rust-coloured rhizomes that creep over the pot rim like little paws. Its one defining need is steady humidity: dry indoor air quickly browns the frond tips, so consistent ambient moisture matters more than anything else.
Growth habit: An evergreen, epiphytic fern with an arching, spreading habit. Its signature feature is the creeping, surface-running rhizome densely covered in soft, rust-brown hairs that resembles a rabbit's foot, from which the finely divided, multi-pinnate fronds emerge.
What fertiliser rabbit's foot fern actually wants — and why
Rabbit's foot fern 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 rabbit's foot fern: 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 rabbit's foot fern, 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 rabbit's foot fern:
Feed with a balanced water-soluble houseplant fertiliser diluted to half strength roughly every three weeks from spring through autumn. Stop feeding over winter while growth slows. Ferns are sensitive to salt build-up, so flush the pot with plain water occasionally and avoid over-feeding, which can brown the delicate frond margins. 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 rabbit's foot fern 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 rabbit's foot fern
Half strength is the safe default for rabbit's foot fern — 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 rabbit's foot fern first if the soil is dry, then apply the diluted feed. The companion question is when to water at all, covered in the rabbit's foot fern watering schedule.
Signs you are over-feeding rabbit's foot fern
Over-feeding is far more common — and more damaging — than under-feeding for most plants. The classic tells for rabbit's foot fern:
- 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 rabbit's foot fern
- 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 rabbit's foot fern care brief covers soil, humidity and the common problems for this species.
Flushing and leaching the salts
Flush the pot of rabbit's foot fern 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 rabbit's foot fern
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 rabbit's foot fern — frequently asked questions
What fertiliser does rabbit's foot fern 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. Rabbit's foot fern 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 rabbit's foot fern?
Feed with a balanced water-soluble houseplant fertiliser diluted to half strength roughly every three weeks from spring through autumn. Stop feeding over winter while growth slows. Ferns are sensitive to salt build-up, so flush the pot with plain water occasionally and avoid over-feeding, which can brown the delicate frond margins. Feed with a balanced water-soluble houseplant fertiliser diluted to half strength roughly every three weeks from spring through autumn. Stop feeding over winter while growth slows. Ferns are sensitive to salt build-up, so flush the pot with plain water occasionally and avoid over-feeding, which can brown the delicate frond margins. 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 rabbit's foot fern?
Half strength is the safe default for rabbit's foot fern — houseplant feeds are formulated strong, and the diluted dose is gentler on the roots while still ample for foliage.
What does over-feeding rabbit's foot fern 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 rabbit's foot fern 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 rabbit's foot fern?
Flush the pot of rabbit's foot fern 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
- Rabbit's foot fern care — the full brief (light, soil, humidity, problems, pet safety)
- How often to water rabbit's foot fern — 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 271 fertilising guides in the Growli library