Skip to main content
Pollinate Happiness
Native to the Northeast, the Mid-Atlantic, the Southeast, and beyond

Moss phlox

Phlox subulata

Evergreen carpet that blooms in April for the first butterflies and bees of spring.

JFMAMJJASOND

Scale and context

One plant, several views

Ground-hugging mat 4–6 in tall. Flowers ¾ in across. These photos are all one individual, photographed in Chester County, PA, USA in April 2023, so you can see how a close-up relates to the whole plant.

Who it feeds

Its April bloom feeds the first butterflies of the year, including spring azures and early swallowtails, and queen bumble bees just out of hibernation.

What it does for the place

An evergreen ground cover for dry, sunny banks that stops erosion and needs nothing once established.

The story

The pink carpets on old stone walls and cemetery banks every April are moss phlox, native to rocky slopes from New York to Michigan. It was a Victorian rockery favorite and has never gone out of style.

Worth knowing

  • It is not a moss; the name refers to the needle-like leaves.
  • It flowers so densely the foliage disappears.
  • Shear lightly after bloom and it stays tight for decades.

Saving its seed

Ripe: Jun, Jul. Tiny capsules after bloom.

Collect: Not worth chasing.

Sow: Rarely grown from seed; divide or take cuttings instead. Divide or root stem cuttings in early summer.

Seed saving calendar for your zip code →

Sources and further reading