California Damasonium
Damasonium californicum
Last reviewed: September 2026
Toxicity unknown
California Damasonium (Damasonium californicum) is not listed by the ASPCA Animal Poison Control Center (opens in new tab) or the other sources we check, so we have no verdict for it either way. Absence from those lists is not a clearance. If your pet shows symptoms after eating any plant, call the ASPCA at (888) 426-4435.
The USDA PLANTS Database (opens in new tab) does not flag California Damasonium as toxic to livestock.
Light
full sun
Water
high
Size
4"–12" H × 4"–8" W
Bloom
May, Jun, Jul
Native to
CA, ID, NV, OR
Pollinators
bees, flies
Before you buy
Your city may pay you to plant this
Cities and water utilities offer rebates for replacing lawn with native and water-wise plants. We track 459 programs across 44 states, each with a link to the provider and the date we last checked it.
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Browse plants for this ecoregion
Damasonium californicum is a small aquatic or wetland annual that grows 4-12 inches tall with modest spread. It produces small flowers from May through July and requires consistently high moisture or standing water to thrive. This specialized plant is adapted to wet meadows, pond edges, and seasonal wetlands.
In an HOA neighborhood
California Damasonium takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Requires standing water or bog conditions
- Dies back completely as annual
- Looks weedy without proper wetland context
Wildlife value
The flowers attract bees and flies during the late spring and summer blooming period. As an aquatic plant, it also provides habitat for wetland insects and amphibians.
Common questions
- How much sun does California Damasonium need?
- California Damasonium grows best in full sun conditions.
- When does California Damasonium bloom?
- California Damasonium blooms in May, June, and July.
- Where is California Damasonium native?
- California Damasonium (Damasonium californicum) is native to CA, ID, NV, OR, per vouchered herbarium specimen records and regional native plant society lists.
- Is California Damasonium toxic to livestock?
- The USDA PLANTS Database does not flag California Damasonium as toxic to livestock.
- What pollinators does California Damasonium attract?
- California Damasonium draws bees and flies.
- Is California Damasonium HOA-friendly?
- California Damasonium takes more care to look intentional in a front yard. Consider it for backyard or mid-zone beds rather than the street edge.
Native range data from vouchered herbarium specimen records and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
If something looks wrong
Common plant problems, and what to check first
These come up on almost any plant. Each guide lists the likely causes in the order they are worth ruling out, with one thing to check before you act on any of them, and links to the source it came from.
- It is dying right after planting
- Leaves turning yellow
- Wilting even though I watered it
- Brown crispy leaf tips
- Bugs on the plant
Ready to grow California Damasonium? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.