Repotting guide

When & how to repot Common Camas (Camassia quamash)

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.

Watch for — Aphids: Can colonise flower stems and foliage in warm spring weather, secreting honeydew and potentially spreading virus. Knock off with a strong water jet or apply insecticidal soap; healthy, well-fed plants are the best defence.

How to tell common camas needs repotting

Repotting on a calendar is less reliable than reading the plant. For common camas, watch for these signs:

Flowering has tailed off year on year and the clump has become congested and overcrowded.
Lots of leaf and few flowers — a classic sign that common camas bulbs or tubers need lifting and dividing.
Bulbs visibly bursting the pot or pushing each other to the surface.
It is the natural dormancy window (foliage yellowed and died back) — the only safe time to lift and split.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot common camas

Lift and divide every 3–4 years once clumps congest. Rather than a true repot, common camas is lifted and divided once the clump congests and flowering drops off. Clump-forming upright perennial bulb sending up basal strap-like leaves and tall flower spikes in late spring before entering summer dormancy..

What size pot to step common camas up to

Pot size matters less than depth and spacing here. When you replant common camas, set the bulbs or tubers at the correct depth (a rough guide: two to three times their own height of soil over the top) and space them so they are not touching. A wide, shallow pot suits a clump better than a tall narrow one.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot common camas

The only safe window is dormancy: wait until the foliage has yellowed and died back naturally, lift and divide then, and replant before or at the start of the next growing season. Disturbing common camas in full growth or flower sets it back badly.

Step-by-step: repotting common camas

Wait for dormancy. Let common camas foliage yellow and die back completely. Lifting while it is in growth wastes the energy it is storing for next year.
Lift carefully. Loosen the soil well away from the bulbs/tubers with a fork and ease the whole clump out without spearing them.
Separate the offsets. Gently pull the clump apart into individual bulbs or tubers. Keep only firm, healthy, blemish-free ones.
Replant at the right depth. Reset them in fresh moist, humus-rich, well-drained loam at the correct depth and spacing — not touching — so each has room to bulk up.
Water in and rest. Water once to settle them, then keep on the dry side until growth resumes. Do not feed until leaves are actively growing.

Aftercare

After replanting common camas, keep the soil barely moist — not wet — until shoots appear; bulbs and tubers rot in cold, saturated soil. Once leaves are growing strongly, resume normal watering. Hold off feeding until the plant is in active growth again.

The right soil mix for common camas

Common Camas wants moist, humus-rich, well-drained loam. Thrives in deep, fertile, moisture-retentive soil but resents prolonged waterlogging; incorporate plenty of well-rotted compost at planting time. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting common camas — frequently asked questions

How often should you repot common camas?

Lift and divide every 3–4 years once clumps congest for common camas. Common Camas is lifted and divided, not "repotted". Every 3–4 years, once the foliage has died back and it is dormant, lift the clump, separate the offsets, and replant at the correct depth in moist, humus-rich, well-drained loam. Crowding, not pot size, is what reduces flowering over time.

What size pot does common camas need?

When is the best time of year to repot common camas?

Do you "repot" common camas, or lift and divide it?

You lift and divide it. Common Camas grows from bulbs or tubers, so instead of repotting you wait for dormancy, lift the congested clump, separate the healthy offsets, and replant them at the right depth and spacing. Doing this every 3–4 years restores flowering.

Should you fertilise common camas after repotting?

Hold off feeding common camas until it is in active growth again. Fresh soil already carries enough nutrients to get it re-established, and feeding disturbed roots too soon does more harm than good.