Mature size & growth rate

How big does Hair sedge (Carex comans 'Frosted Curls') get?

Also called Hair sedge, Frosted Curls sedge, New Zealand hair sedge.

More about hair sedge

About Hair sedge

Carex comans 'Frosted Curls' · also called Hair sedge, Frosted Curls sedge · flowering

A graceful, fine-textured New Zealand sedge forming low fountains of silvery-green, thread-like leaves that curl at the tips. Evergreen and undemanding, it grows in full sun to partial shade in well-drained, fertile soil. Hardy to H4, it tolerates light frost but dislikes wet winter soils or waterlogging.

Mature size: 30–45 cm tall and wide (12–18 in)

Watch for — Aphid colonies on new growth: Aphids occasionally cluster on emerging foliage in spring. Knock off with a strong jet of water or apply insecticidal soap. Heavy infestations cause distorted, sticky growth; beneficial insects usually control minor outbreaks naturally.

Indoor size vs how big it gets in the wild

Hair sedge 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 30–45 cm tall and wide (12–18 in). 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

Hair sedge 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 with a balanced, slow-release granular fertilizer in early spring. a single annual application is usually sufficient in average garden soil. over-fertilizing produces lush, floppy growth and dilutes the desirable silvery coloring. no feeding needed in winter.

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

How to keep hair sedge smaller

You are not stuck with the maximum size. For hair sedge specifically, these are the levers, in order of impact:

Trim the longest vines back to the length you want — hair sedge 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 hair sedge 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 hair sedge bigger or faster

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

When hair sedge outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for hair sedge:

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 hair sedge repotting guide. If you want more of this plant instead of a bigger one, the hair sedge propagation guide turns prunings into new plants.

Hair sedge size — frequently asked questions

How big does hair sedge get?

Hair sedge reaches 30–45 cm tall and wide (12–18 in) 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 hair sedge slow or fast growing?

Hair sedge is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Hair sedge 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 hair sedge 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 hair sedge smaller?

Trim the longest vines back to the length you want — hair sedge 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 hair sedge 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.