Border phlox
Phlox paniculata
Also called Perennial phlox and Summer phlox
Garden plant · PerennialsThin the shoots to five or six in spring. A crowded clump gets mildew every August, and no amount of watering stops it.
Care at a glance
- Ease
- Medium
- Water
- Every 4 daysWater the ground — water at the base, in the morning, not over the leaves.
- Light
- Full sun to part shade
- Feed
- Every 45 days
- Humidity
- Average
- Hardiness
- Very hardy RHS H7, to -25°C
- Size
- 1.25 m tall · 0.75 m across
- Lifecycle
- Perennial
- Origin
- Eastern United States
Is it safe for pets and people?
PetsNothing recorded against it
No animal-poison authority lists this plant either way.
PeopleNot checked yet
Nobody has checked this one against a source for us yet, so treat it as unknown rather than safe.
Checked against ASPCA and RHS on 2026-08-03. Where a source says nothing, we say nothing.
A guide, not veterinary or medical advice. If a pet or a person has eaten a plant and you are worried, call your vet or doctor now — don’t wait for signs to appear. Spotted a mistake? Tell us.