Thick-leaf Phlox
Phlox carolina
Last reviewed: September 2026
Phlox carolina, or thick-leaf phlox, blooms pink from May through July and grows best in part sun with consistently moist, medium-water soil. Bees, butterflies, and moths visit its flowers throughout the summer.
Toxicity unknown
Thick-leaf Phlox (Phlox carolina) 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
part sun
Water
medium
Size
12"–24" H × 12"–18" W
Bloom
May, Jun, Jul
Native to
AL, AR, FL, GA and 11 more states
Pollinators
bees, butterflies, moths
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.
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Thick-leaf phlox is a compact native perennial that produces clusters of fragrant pink, purple, or white flowers from May through July. This well-behaved plant forms neat clumps and works well in both formal and naturalistic garden settings. Its moderate size and tidy growth habit make it suitable for front yard plantings.
Growing Thick-leaf Phlox
Grow Thick-leaf Phlox in part sun and medium water. Mature plants reach 12 to 24 inches tall and spread 12 to 18 inches wide. Expect low maintenance to keep it looking intentional in a front yard.
In an HOA neighborhood
Thick-leaf Phlox 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
The fragrant flowers attract bees, butterflies, and moths throughout the long blooming season. This native phlox is particularly valuable for supporting native pollinators during late spring and early summer.
Common questions
- When does thick-leaf phlox bloom?
- Phlox carolina typically flowers from May through July, producing clusters of pink to lavender blooms over several weeks.
- What pollinators does Phlox carolina attract?
- Bees, butterflies, and moths regularly visit thick-leaf phlox for nectar during its summer bloom period.
- How much sun and water does thick-leaf phlox need?
- It grows best in part sun with medium, evenly moist soil, and can tolerate brighter full sun spots if watering is kept consistent.
- Is Phlox carolina an evergreen or deciduous plant?
- Thick-leaf phlox is a deciduous herbaceous perennial that dies back to the ground after the growing season and regrows the following spring.
- Is Thick-leaf Phlox HOA-friendly?
- Thick-leaf Phlox 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 Thick-leaf Phlox? Add it to your garden in Pollinator Patch to track it and get season-by-season care guidance.
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