Bog Rush
Juncus biflorus
Last reviewed: August 2026
Juncus biflorus is a clumping, grass-like forb that blooms from June through August and grows well in part sun with medium to wet soil, often found in marshes, ditches and wet meadows.
Toxicity unknown
Bog Rush (Juncus biflorus) 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 Bog Rush as toxic to livestock.
Light
part sun
Water
medium
Size
6"–24" H × 3"–12" W
Bloom
Jun, Jul, Aug
Native to
AL, AR, AZ, FL and 15 more states
Before you buy
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Juncus biflorus is a compact native rush that forms neat clumps of slender, upright green stems. It produces small, inconspicuous flowers during summer months and maintains a tidy, grass-like appearance throughout the growing season.
Growing Bog Rush
Grow Bog Rush in part sun and medium water. Mature plants reach 6 to 24 inches tall and spread 3 to 12 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Bog Rush is an HOA-friendly choice. Maintenance level: low. Tidiness: 4 out of 5.
Works well in: front yard, foundation, street edge, mid zone.
Wildlife value
This rush provides habitat and nesting material for birds and supports various small insects. The seeds are eaten by waterfowl and songbirds.
Common questions
- When does Juncus biflorus bloom?
- Juncus biflorus produces its small greenish flower clusters from June through August, typical of many wetland rush species.
- How much light and water does Juncus biflorus need?
- This rush does best in part sun with medium to consistently moist soil, though it can handle wetter conditions such as pond edges and low, seasonally flooded ground.
- What kind of habitat suits Juncus biflorus?
- Juncus biflorus is typically found in wet meadows, roadside ditches, marsh edges and other low, moisture-retaining sites where its grass-like clumps can spread.
- Is Juncus biflorus a grass?
- It looks grass-like but is actually a forb in the rush family, with round, hollow stems rather than the flat blades typical of true grasses.
- Is Bog Rush toxic to livestock?
- The USDA PLANTS Database does not flag Bog Rush as toxic to livestock.
- Is Bog Rush HOA-friendly?
- Bog Rush 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
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