Mature size & growth rate

How big does Naomi Hakone Grass (Hakonechloa macra 'Naomi') get?

Also called naomi hakone grass, white-edged hakone grass.

More about naomi hakone grass

About Naomi Hakone Grass

Hakonechloa macra 'Naomi' · also called naomi hakone grass, white-edged hakone grass · flowering

Hakonechloa macra 'Naomi' is a Japanese forest grass with bright gold-and-green variegated blades that take on rosy-red and purple tints in autumn. Its arching, cascading mounds light up shady borders and containers. Like all hakone grasses it favours part shade and rich, consistently moist soil, rewarding patience with a soft, flowing deciduous form.

Mature size: 30-40 cm tall and 40-60 cm wide, bulking up slowly over several seasons.

Watch for — Slow to fill in: Naturally slow-growing; over-watering or over-fertilising to speed it up only causes weak, floppy blades.

Indoor size vs how big it gets in the wild

Naomi Hakone Grass 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 30-40 cm tall and 40-60 cm wide, bulking up slowly over several seasons.. 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

Naomi Hakone 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: give a light spring feed of balanced slow-release fertiliser or top-dress with compost. keep nitrogen modest to preserve crisp variegation and avoid lax, floppy growth.

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

How to keep naomi hakone grass smaller

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

Trim the longest vines back to the length you want — naomi hakone grass 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 naomi hakone grass 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 naomi hakone grass bigger or faster

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

More (indirect) light dramatically lengthens the vines and enlarges the leaves.
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 naomi hakone grass light requirements page covers exactly how bright a spot it needs to grow at its potential instead of stalling.

When naomi hakone grass outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for naomi hakone grass:

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

Naomi Hakone Grass size — frequently asked questions

How big does naomi hakone grass get?

Naomi Hakone Grass reaches 30-40 cm tall and 40-60 cm wide, bulking up slowly over several seasons. 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 naomi hakone grass slow or fast growing?

Naomi Hakone Grass is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. Naomi Hakone Grass 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 naomi hakone 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 naomi hakone grass smaller?

Trim the longest vines back to the length you want — naomi hakone grass 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 naomi hakone grass grow bigger or faster?

More (indirect) light dramatically lengthens the vines and enlarges the leaves. 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.