Mature size & growth rate

How big does Goldtau Hair Grass (Deschampsia cespitosa 'Goldtau') get?

Also called Goldtau Tufted Hair Grass, Gold Dew Tufted Hair Grass.

More about goldtau hair grass

About Goldtau Hair Grass

Deschampsia cespitosa 'Goldtau' · also called Goldtau Tufted Hair Grass, Gold Dew Tufted Hair Grass · flowering

Goldtau Hair Grass is a refined cultivar of tufted hair grass producing dense evergreen mounds of dark, arching foliage topped with billowing clouds of fine golden-yellow spikelets in summer. One of the few ornamental grasses that thrives in shade as well as sun, it remains attractive year-round in cool, moist climates. Non-toxic and excellent for woodland-edge or rain-garden plantings.

Mature size: Foliage clump 30-45 cm tall; flower stems 90-120 cm; clump 45-60 cm wide

Indoor size vs how big it gets in the wild

Goldtau Hair Grass grows into a room-scaled plant of roughly foliage clump 30-45 cm tall — bigger than a tabletop plant, but not a tree. Indoors and in a pot, expect foliage clump 30-45 cm tall. In the ground with no restriction it is a completely different plant — flower stems 90-120 cm; clump 45-60 cm wide — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

It builds steadily in both height and spread to a medium, manageable size, filling a pot and a corner over a few years.

Growth rate and years to mature

Goldtau Hair Grass 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: apply a balanced slow-release granular fertiliser in early spring to support the flush of new growth and flower stems. one annual application is typically sufficient. avoid high-nitrogen feeds that produce rank, floppy foliage.

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

How to keep goldtau hair grass smaller

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

Prune the tallest or longest growth back to a node to hold goldtau hair grass at the size you want.
Keep it slightly pot-bound and feed sparingly to cap the overall size.
Remove the largest or oldest leaves to keep the footprint in check.

How to grow goldtau hair grass bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for goldtau hair grass the accelerators are:

Brighter indirect light is the single biggest growth lever here.
Pot up a size every year or two while it is establishing.
Feed and water consistently through the growing season for steady, faster size gain.

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

When goldtau hair grass outgrows the room (or the pot)

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

It crowds the shelf or corner it lives in and starts leaning for light.
Roots circling the pot base or escaping the drainage holes.
It needs a noticeably bigger pot every year — a sign to pot up, divide, or prune.

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

Goldtau Hair Grass size — frequently asked questions

How big does goldtau hair grass get?

Goldtau Hair Grass reaches foliage clump 30-45 cm tall when grown indoors, and far larger where it grows unrestricted (flower stems 90-120 cm; clump 45-60 cm wide). It builds steadily in both height and spread to a medium, manageable size, filling a pot and a corner over a few years.

Is goldtau hair grass slow or fast growing?

Goldtau Hair Grass is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Goldtau Hair Grass grows into a room-scaled plant of roughly foliage clump 30-45 cm tall — bigger than a tabletop plant, but not a tree.

How long does goldtau hair grass 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 goldtau hair grass smaller?

Prune the tallest or longest growth back to a node to hold goldtau hair grass at the size you want. Keep it slightly pot-bound and feed sparingly to cap the overall size. Remove the largest or oldest leaves to keep the footprint in check.

How can I make goldtau hair grass grow bigger or faster?

Brighter indirect light is the single biggest growth lever here. Pot up a size every year or two while it is establishing. Feed and water consistently through the growing season for steady, faster size gain.