Mature size & growth rate

How big does Common Camas (Camassia quamash) get?

Also called Common camas, Quamash, Small camas, Wild hyacinth.

More about common camas

About Common Camas

Camassia quamash · also called Common camas, Quamash · edible

Common camas is a bulbous perennial native to moist meadows and prairies of western North America, where it was a critical food staple for many Indigenous peoples including the Nez Perce. It thrives in moisture-retentive, fertile soil in full sun to light shade and produces spikes of violet-blue star-shaped flowers in late spring. The single most important care fact is never to allow the foliage to be removed before it dies back naturally, as the bulb needs those weeks to store energy for the following year. The bulbs of common camas are considered non-toxic to humans and pets when correctly identified, but must not be confused with death camas (Anticlea elegans syn. Zigadenus venenosus), a highly toxic look-alike — always source plants from reputable nurseries.

Mature size: 45–80 cm tall in flower, clumps spread to 15–20 cm over several years.

Indoor size vs how big it gets in the wild

Common Camas 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 45–80 cm tall in flower, clumps spread to 15–20 cm over several years.. 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.

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

Common Camas is a fast grower. Realistically, expect two to four years from a young plant to a room-filling specimen in good light. Its feeding profile backs this up: apply a balanced bulb fertiliser or bone meal at planting time in autumn; a low-nitrogen feed after flowering helps the bulb rebuild reserves for next year.

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

How to keep common camas smaller

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

Divide the clump every year or two — splitting common camas 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 common camas 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 common camas bigger or faster

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

When common camas outgrows the room (or the pot)

"Too big" usually arrives as one of these signs for common camas:

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

Common Camas size — frequently asked questions

How big does common camas get?

Common Camas reaches 45–80 cm tall in flower, clumps spread to 15–20 cm over several years. when grown indoors. 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 common camas slow or fast growing?

Common Camas is a fast grower. Expect two to four years from a young plant to a room-filling specimen in good light. Common Camas 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 common camas take to reach full size?

Roughly two to four years from a young plant to a room-filling specimen in good light. Light, pot size and feeding move that timeline more than anything else.

How do I keep common camas smaller?

Divide the clump every year or two — splitting common camas 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 common camas 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.