Mature size & growth rate

How big does The Blues Little Bluestem (Schizachyrium scoparium 'The Blues') get?

Also called The Blues little bluestem, The Blues bluestem.

More about the blues little bluestem

About The Blues Little Bluestem

Schizachyrium scoparium 'The Blues' · also called The Blues little bluestem, The Blues bluestem · flowering

Schizachyrium scoparium 'The Blues' is a selected cultivar of little bluestem chosen for exceptional steely-blue summer foliage — the most intensely blue of any commonly available little bluestem. It turns vivid orange-red in autumn with showy white seed heads. Compact and upright, it performs best in lean soils and full sun, maintaining a tighter, more uniform clump than the straight species.

Mature size: 60–90 cm tall; clumps 30–45 cm wide — slightly more compact than the straight species

Watch for — Reversion to species habit in heavy soils: In clay-heavy or very fertile conditions, 'The Blues' loses its compact, upright silhouette and floppy growth makes it indistinguishable from the straight species. Sharp drainage is a non-negotiable requirement for this cultivar.

Indoor size vs how big it gets in the wild

The Blues Little Bluestem stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward. Indoors and in a pot, expect 60–90 cm tall. In the ground with no restriction it is a completely different plant — clumps 30–45 cm wide; slightly more compact than the straight species — which is why the pot, the light and the pruning matter so much for the size you actually end up with.

Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Growth rate and years to mature

The Blues Little Bluestem 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: do not fertilise. 'the blues' is a cultivar selected precisely for its behaviour in lean soils; fertilising destroys the compact habit and the depth of blue colour that define it as a named selection. grow in unamended, infertile soil.

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

How to keep the blues little bluestem smaller

You are not stuck with the maximum size. For the blues little bluestem specifically, these are the levers, in order of impact:

Divide the clump every year or two — splitting the blues little bluestem is the main way to control its spread and refresh it.
Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump.
Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

The keep-it-smaller method, step by step

Lift the whole plant. Slide the blues little bluestem out of its pot in spring when the clump has filled it.
Split the clump. Tease or cut the rootball into two or more sections, each with healthy roots and growth.
Repot one division. Put a single division back in the original pot to reset it to a smaller size; pot or give away the rest.
Remove offsets as they form. Through the year, detach new runners or pups to stop it spreading again.

How to grow the blues little bluestem bigger or faster

If you want it to fill the space sooner, push the conditions rather than hoping — for the blues little bluestem the accelerators are:

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger.
Good light plus regular feeding maximises offset and runner production.
Leave plantlets and offsets attached and feed through the growing season for the fastest spread.

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

When the blues little bluestem outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for the blues little bluestem:

The clump bulging over the pot rim or splitting the pot — the cue to divide, not to find a bigger room.
A dense centre that goes bare or tired while the edges keep spreading.
Runners or offsets escaping across the shelf or into neighbouring pots.

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

The Blues Little Bluestem size — frequently asked questions

How big does the blues little bluestem get?

The Blues Little Bluestem reaches 60–90 cm tall when grown indoors, and far larger where it grows unrestricted (clumps 30–45 cm wide; slightly more compact than the straight species). Size here is about width, not height: the plant builds an ever-wider clump or sends out plantlets and runners while staying relatively short.

Is the blues little bluestem slow or fast growing?

The Blues Little Bluestem is a moderate grower. Expect three to six years to reach mature indoor size, gaining a steady amount each growing season. The Blues Little Bluestem stays fairly low but widens over time — it spreads into a bigger clump by offsets, runners or rhizomes rather than shooting upward.

How long does the blues little bluestem 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 the blues little bluestem smaller?

Divide the clump every year or two — splitting the blues little bluestem is the main way to control its spread and refresh it. Remove runners, plantlets or offsets as they appear if you want it to stay a single tight clump. Keep it slightly pot-bound; a snug pot naturally limits how wide the clump can get.

How can I make the blues little bluestem grow bigger or faster?

Give it a wider pot and let the clump fill it — width is exactly how this plant gets bigger. Good light plus regular feeding maximises offset and runner production. Leave plantlets and offsets attached and feed through the growing season for the fastest spread.