Mature size & growth rate

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

Also called Crisped blue star fern, Lettuce fern.

More about mandaianum blue star fern

About Mandaianum Blue Star Fern

Phlebodium aureum 'Mandaianum' · also called Crisped blue star fern, Lettuce fern · houseplant

'Mandaianum' is a distinctive blue star fern selection with wavy, ruffled and crested frond margins that give it a lettuce-like, frilly look. Like all Phlebodium aureum it is an easy-going epiphytic fern with bluish fronds and a furry creeping rhizome, tolerating average humidity and occasional dryness far better than typical ferns.

Mature size: 30-50 cm tall and wide indoors; fronds may reach longer in optimal conditions.

Indoor size vs how big it gets in the wild

Mandaianum 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 30-50 cm tall and wide indoors. In the ground with no restriction it is a completely different plant — fronds may reach longer in optimal conditions. — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

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

Mandaianum 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 monthly in spring and summer with a balanced liquid feed at half strength. as an epiphyte it needs little fertiliser and is sensitive to salt accumulation; flush the pot occasionally. stop feeding over autumn and winter.

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

How to keep mandaianum blue star fern smaller

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

Trim the longest vines back to the length you want — mandaianum 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 mandaianum 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 mandaianum blue star fern bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for mandaianum 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 mandaianum blue star fern light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

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

"Too big" usually arrives as one of these signs for mandaianum 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 mandaianum blue star fern repotting guide. If you want more of this plant instead of a bigger one, the mandaianum blue star fern propagation guide turns prunings into new plants.

Mandaianum Blue Star Fern size — frequently asked questions

How big does mandaianum blue star fern get?

Mandaianum Blue Star Fern reaches 30-50 cm tall and wide indoors when grown indoors, and far larger where it grows unrestricted (fronds may reach longer in optimal conditions.). 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 mandaianum blue star fern slow or fast growing?

Mandaianum Blue Star Fern is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Mandaianum 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 mandaianum 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 mandaianum blue star fern smaller?

Trim the longest vines back to the length you want — mandaianum 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 mandaianum 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.