Mature size & growth rate

How big does Blue Star Fern (Phlebodium aureum) get?

Also called Blue star fern, Golden polypody, Cabbage palm fern, Gold-foot fern, Hare's-foot fern.

More about blue star fern

About Blue Star Fern

Phlebodium aureum · also called Blue star fern, Golden polypody · tropical

The blue star fern is an epiphytic tropical fern grown for its arching, wavy, blue-green fronds that rise from a furry, creeping rhizome. Its one defining care need is steady moisture without sogginess: keep the loose, organic mix lightly damp at all times, but never let the rhizome sit waterlogged, which quickly causes rot.

Mature size: Reaches roughly 0.5-1 m tall and wide as a mature houseplant, typically within 2-5 years, though it stays more compact in smaller pots. In the wild it can be larger.

Watch for — Buried rhizome failing to grow: The furry rhizome must rest on top of the mix, not be planted under it. Burying it causes rot and stalls new frond production, so when potting, lay it on the surface.

Indoor size vs how big it gets in the wild

Blue Star Fern does not get tall — it gets long. Size here is about stem length and how you train or cut it, not how much floor it claims. Indoors and in a pot, expect reaches roughly 0.5-1 m tall and wide as a mature houseplant, typically within 2-5 years, though it stays more compact in smaller pots. in the wild it can be larger.. A pot, your light levels and a little pruning are what set the final size in a home, far more than the plant's theoretical potential.

Growth shows up as lengthening stems that trail down or climb up a support; the plant can be kept tiny or grown metres long from the exact same root system.

Growth rate and years to mature

Blue Star Fern is a moderate grower. Realistically, expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Its feeding profile backs this up: feed lightly with a balanced liquid houseplant feed at half strength roughly monthly through spring and summer. ferns are sensitive to salt build-up, so dilute well and flush the pot occasionally. stop feeding in autumn and winter when growth slows, resuming only when new fronds appear.

Want this turned into the right next pot at the right moment? The pot size calculator and the blue star fern repotting guide cover when and how much to size up — pot size is one of the biggest levers on how fast blue star fern grows.

How to keep blue star fern smaller

You are not stuck with the maximum size. For blue star fern specifically, these are the levers, in order of impact:

Trim the longest vines back to the length you want — blue star fern takes hard cutting well and bushes out from the cut.
Cut just above a leaf node; each trimmed stem usually branches into two, so pruning makes it fuller, not sparser.
The cuttings root easily in water or mix, so "keeping it smaller" doubles as free new plants.
A trim once or twice a season is usually enough to hold its length.

The keep-it-smaller method, step by step

Decide the length you want. Pick the point each vine of blue star fern should stop — you can be aggressive; it regrows readily.
Cut just above a node. Snip about 0.5 cm above a leaf node so the stem branches there instead of dying back.
Root the cuttings. Drop the trimmed pieces in water or mix — they root in 2-4 weeks and can fill the same pot for a bushier look.
Repeat as it runs. Re-trim whenever it overshoots; regular light pruning keeps it both smaller and fuller.

How to grow blue star fern bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for blue star fern the accelerators are:

Good light plus a moss pole or trellis triggers the longest, fastest, largest-leaved growth.
Give it something to climb — many vines grow far faster and bigger up a support than trailing.
Feed through spring and summer and keep it consistently watered while it is actively running.

Light is almost always the ceiling. The blue star fern light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When blue star fern outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for blue star fern:

Vines pooling on the floor or wrapping past where you want them — purely a trimming cue, not a repot one.
Bare, leggy stems with leaves only at the tips (usually a light problem, not a size one).
A tangled mass that has outrun its support and needs cutting back and re-training.

If it is the pot rather than the room, it is a repotting job, not a goodbye — see the blue star fern repotting guide. If you want more of this plant instead of a bigger one, the blue star fern propagation guide turns prunings into new plants.

Blue Star Fern size — frequently asked questions

How big does blue star fern get?

Blue Star Fern reaches reaches roughly 0.5-1 m tall and wide as a mature houseplant, typically within 2-5 years, though it stays more compact in smaller pots. in the wild it can be larger. when grown indoors. Growth shows up as lengthening stems that trail down or climb up a support; the plant can be kept tiny or grown metres long from the exact same root system.

Is blue star fern slow or fast growing?

Blue Star Fern is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Blue Star Fern does not get tall — it gets long. Size here is about stem length and how you train or cut it, not how much floor it claims.

How long does blue star fern take to reach full size?

Roughly three to six years to reach mature indoor size, gaining a steady amount each growing season. Light, pot size and feeding move that timeline more than anything else.

How do I keep blue star fern smaller?

Trim the longest vines back to the length you want — blue star fern takes hard cutting well and bushes out from the cut. Cut just above a leaf node; each trimmed stem usually branches into two, so pruning makes it fuller, not sparser. The cuttings root easily in water or mix, so "keeping it smaller" doubles as free new plants. A trim once or twice a season is usually enough to hold its length.

How can I make blue star fern grow bigger or faster?

Good light plus a moss pole or trellis triggers the longest, fastest, largest-leaved growth. Give it something to climb — many vines grow far faster and bigger up a support than trailing. Feed through spring and summer and keep it consistently watered while it is actively running.