Asthmaplant
Euphorbia hirta
Last reviewed: August 2026
Toxicity unknown
Asthmaplant (Euphorbia hirta) 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.
Light
full sun
Water
medium
Size
4"–20" H × 4"–12" W
Bloom
Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov
Native to
AL, AZ, CA, FL and 9 more states
Pollinators
bees, beetles
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 445 programs across 44 states, each with a link to the provider and the date we last checked it.
Find rebates in your areaBrowse plants for this ecoregion
Asthmaplant is a small annual herb that grows as a low spreading groundcover or border plant. It produces tiny flowers from spring through fall and tolerates heat well in sunny locations. This native plant requires minimal care once established and naturally reseeds in favorable conditions.
In an HOA neighborhood
Asthmaplant takes more care to keep looking intentional in a front yard. Maintenance level: moderate. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Very informal appearance resembles a weed
- Annual lifecycle creates gaps when plants die back
- Self-seeding habit can appear untidy
Wildlife value
The long blooming period provides nectar for bees and beetles from March through November. Its small stature makes it useful for supporting pollinators in compact garden spaces.
Common questions
- How much sun does Asthmaplant need?
- Asthmaplant grows best in full sun conditions.
- When does Asthmaplant bloom?
- Asthmaplant blooms in March, April, May, June, July, August, September, October, and November.
- Where is Asthmaplant native?
- Asthmaplant (Euphorbia hirta) is native to AL, AZ, CA, FL and 9 more states, per vouchered herbarium specimen records and regional native plant society lists.
- What pollinators does Asthmaplant attract?
- Asthmaplant draws bees and beetles.
- Is Asthmaplant HOA-friendly?
- Asthmaplant 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.
Ready to grow Asthmaplant? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Not sure where to start? Take the 2-minute yard quiz