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Disk Waterhyssop

Bacopa rotundifolia

Last reviewed: June 2026

Disk Waterhyssop (Bacopa rotundifolia)
Photo: Robert H. Mohlenbrock @ USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln / Wikimedia Commons (Public domain)

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

Browse plants for this ecoregion

Central Oklahoma/Texas PlainsEdwards PlateauTexas Blackland PrairiesWestern Gulf Coastal PlainSouth Central Plains

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.

Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.

Does Disk Waterhyssop fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.

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