Disk Waterhyssop
Bacopa rotundifolia
Last reviewed: August 2026
Toxicity unknown
Disk Waterhyssop (Bacopa rotundifolia) 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 Disk Waterhyssop as toxic to livestock.
Light
part sun
Water
high
Size
4"–12" H × 6"–18" W
Bloom
Jun, Jul, Aug, Sep
Native to
AL, AR, AZ, CO and 25 more states
Pollinators
bees, butterflies
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 452 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
Disk waterhyssop is a low-growing perennial that forms spreading mats in moist to wet soils. This aquatic or semi-aquatic plant produces small flowers from June through September and thrives in partial sun conditions. It requires consistently high moisture levels and is best suited for bog gardens, pond edges, or other water features.
In an HOA neighborhood
Disk Waterhyssop 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 specialized wet conditions that are uncommon in typical landscaping
- Low spreading growth can appear uncontrolled or weedy
- High water needs may conflict with water-wise landscaping expectations
Wildlife value
The extended blooming period from summer through early fall provides nectar for bees and butterflies. Its low, dense growth habit can also offer shelter for small beneficial insects.
Common questions
- How much sun does Disk Waterhyssop need?
- Disk Waterhyssop grows best in part sun conditions.
- When does Disk Waterhyssop bloom?
- Disk Waterhyssop blooms in June, July, August, and September.
- Where is Disk Waterhyssop native?
- Disk Waterhyssop (Bacopa rotundifolia) is native to AL, AR, AZ, CO and 25 more states, per the World Checklist of Vascular Plants (Kew).
- Is Disk Waterhyssop toxic to livestock?
- The USDA PLANTS Database does not flag Disk Waterhyssop as toxic to livestock.
- What pollinators does Disk Waterhyssop attract?
- Disk Waterhyssop draws bees and butterflies.
- Is Disk Waterhyssop HOA-friendly?
- Disk Waterhyssop 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 the World Checklist of Vascular Plants (Kew). 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 Disk Waterhyssop? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
Planning a bed around it? Start a free plan with this plant
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