Repotting guide

When & how to repot White Brodiaea (Triteleia hyacinthina)

Also called White brodiaea, Hyacinth brodiaea, White triplet lily, Fool's onion.

More about white brodiaea

About White Brodiaea

Triteleia hyacinthina · also called White brodiaea, Hyacinth brodiaea · flowering

Triteleia hyacinthina is a cormous perennial native to moist meadows and grasslands of western North America, from British Columbia south to California. It produces airy umbels of white, sometimes faintly lavender-tinged flowers on slender stems in late spring to early summer. The single most important care fact is to allow the corms a warm, dry summer dormancy after flowering — summer watering will rot the bulbs. Triteleia is not listed on the ASPCA toxic plant database; however, it has not been individually confirmed as non-toxic, so caution with pets is advised.

Mature size: Stems reach 40–70 cm (16–28 in) tall; corms spread slowly into small clumps over several years.

Watch for — Failure to flower: Usually caused by insufficient warmth and drought during dormancy, or planting too shallow. Ensure corms are planted 8–10 cm deep in a sunny spot that dries out naturally in summer.

How to tell white brodiaea needs repotting

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

Roots spiralling thickly out of the drainage holes or pushing the whole plant up out of the pot.
The pot is so packed that water runs straight through in seconds and barely wets the soil.
It has split a plastic pot, or the rootball is a solid mass with almost no soil left when you slide it out.
Growth and (for white brodiaea) flowering have clearly stalled despite good light and feeding — but remember this plant likes being snug, so a little crowding alone is not a reason to repot.

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 white brodiaea

Only every 2–4 years, when genuinely crowded. White Brodiaea is one of the plants that genuinely prefers a snug pot — it grows and flowers better with its roots a little restricted, so resist the urge to repot it on schedule. Clump-forming cormous perennial with upright, slender stems bearing umbels of starry white flowers..

What size pot to step white brodiaea up to

Go up only one pot size — roughly 2–3 cm (about an inch) wider in diameter, no more. White Brodiaea positively prefers a snug pot: it flowers and grows better when the roots are a little restricted. The single biggest repotting mistake here is over-potting — dropping white brodiaea into a pot two or three sizes up. All that surplus soil holds water the small root system cannot use, stays cold and wet, and rots the roots within weeks. When in doubt, choose the smaller pot.

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 white brodiaea

Early spring, just as new growth restarts, is the ideal window for white brodiaea. The plant is moving into its strongest growth phase and re-roots into fresh soil quickly. Avoid repotting in winter dormancy or, for flowering plants, while it is in bud or bloom — recovery is slowest then and you risk dropping the flowers.

Step-by-step: repotting white brodiaea

Confirm it actually needs it. Slide white brodiaea out and check the roots. Only continue if it is genuinely packed — this plant prefers a snug pot, so if there is still soil and room, put it straight back.
Pick a pot only one size up. Choose a pot just 2–3 cm wider with good drainage. Resist anything bigger; over-potting is the main killer here.
Ease it out gently. Water lightly the day before, then tip white brodiaea out, supporting the base. Tease the outer roots free only enough to stop them circling.
Repot at the same depth. Add a layer of fresh sandy or loamy, sharply drained, set the plant so the soil line sits exactly where it did before, and backfill around the sides, firming lightly.
Settle it in. Water once to settle the soil, then let it sit. Hold off on more water until the top of the soil dries — fresh soil around a small root system stays wet for a while.

Aftercare

Because the new soil holds more water than the old crammed rootball did, ease right back on watering — let the top of the soil dry before you water white brodiaea again, or you will rot the roots in the very pot you just moved it to. Keep it out of harsh direct sun for a fortnight. Do not fertilise for about 4 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for white brodiaea

White Brodiaea wants sandy or loamy, sharply drained. Plant corms in light, free-draining soil with a neutral to slightly alkaline pH; heavy clay must be amended with grit to prevent waterlogging. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting white brodiaea — frequently asked questions

How often should you repot white brodiaea?

Only every 2–4 years, when genuinely crowded for white brodiaea. Only repot white brodiaea every 2–4 years, and only when it is genuinely root-bound — it flowers and grows best slightly crowded. Step up just one pot size in spring using sandy or loamy, sharply drained. The key mistake is over-potting: a too-big pot stays wet and rots the roots.

What size pot does white brodiaea need?

When is the best time of year to repot white brodiaea?

Does white brodiaea like to be root-bound?

Yes — white brodiaea genuinely flowers and grows best when slightly pot-bound, so do not rush to repot it. The mistake to avoid is over-potting into a much larger pot: the excess soil stays wet, the roots cannot use it, and the plant rots. Only repot every few years and only one snug size up.

Should you fertilise white brodiaea after repotting?

Not immediately. Wait about 4 weeks after repotting white brodiaea. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.