Blue Waterleaf
Hydrolea ovata
Last reviewed: August 2026
Hydrolea ovata, or blue waterleaf, is a wetland forb with blue flowers that blooms from June through November in swamps, ditches and pond edges across the Gulf Coast and lower Mississippi Valley.
Toxicity unknown
Blue Waterleaf (Hydrolea ovata) 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
high
Size
24"–36" H × 6"–18" W
Bloom
Jun, Jul, Aug, Sep, Oct, Nov
Native to
AL, AR, FL, GA and 7 more states
Pollinators
butterflies, bees
Before you buy
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Blue Waterleaf is a moisture-loving perennial that produces clusters of bright blue flowers from summer through late fall. This native forb grows 2-3 feet tall with a narrow spread, making it suitable for rain gardens and consistently moist areas. The plant goes dormant in winter, dying back to ground level before returning in spring.
Growing Blue Waterleaf
Grow Blue Waterleaf in full sun and high water. Mature plants reach 24 to 36 inches tall and spread 6 to 18 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Blue Waterleaf is an HOA-friendly choice. Maintenance level: low. Tidiness: 2 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
Wildlife value
The long blooming period provides nectar for butterflies and bees from June through November. The extended flower production makes it particularly valuable for late-season pollinators preparing for winter.
Common questions
- When does blue waterleaf bloom?
- Hydrolea ovata typically flowers from June through November, with blue blossoms appearing along stems in wet, sunny sites.
- What kind of habitat does blue waterleaf need?
- This plant grows in standing or saturated water such as swamps, ditches, marshes and pond margins, and it needs full sun and consistently high moisture to thrive.
- Do pollinators visit blue waterleaf flowers?
- Bees and butterflies commonly visit the blue flowers of Hydrolea ovata for nectar and pollen during its summer and fall bloom period.
- Can blue waterleaf tolerate drier soil?
- Blue waterleaf performs best in consistently wet to seasonally flooded soil and does not tolerate extended dry conditions well.
- Is Blue Waterleaf HOA-friendly?
- Blue Waterleaf is generally an HOA-friendly choice in the right placement, with low maintenance.
These answers were drafted with an AI model from this plant's data. Verify care details with a local expert.
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 Blue Waterleaf? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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