Cooper's Haworthia

Haworthia cooperi

Also called Window haworthia.

A small clump of plump, glassy-tipped leaves that glow when light shines through them. Happy in a bright spot without harsh sun.

  • LightBright shade (1 of 3)
  • WaterLow (1 of 3)
  • Beginner friendly
  • Pet-safe
  • Copes with low light
A Haworthia cooperi rosette of plump, translucent green leaves with fine white lines, in a pot of white gravel.
Photo: Abu Shawka on Wikimedia Commons · CC0 1.0 Universal (Public Domain Dedication). Resized and converted to WebP.

Key facts

Light
Bright, indirect lightBright light without harsh afternoon sun. Strong sun turns it red-brown and can scorch the leaf tips.
Water
Water when the soil is fully dry. About every 2–3 weeks in spring and autumn; much less in summer heat and winter.
Soil
Gritty cactus mix in a shallow pot with a drainage hole.
Pets
Pet-safeHaworthia is listed as non-toxic to cats and dogs by the ASPCA.
Difficulty
Beginner friendly

More details

Temperature
Keep above 40°F (4°C). Not frost hardy.
Growing season
Spring and autumn. Rests in high summer heat and in winter.
Size
Small. Each rosette is about 2–3 in (5–8 cm) wide, slowly forming a clump.
Propagate from
Offsets
Native to
Eastern Cape, South Africa, often half-buried among grasses and rocks.

Why people love it

Cooper’s haworthia looks like a cluster of tiny green gems. Each fat leaf ends in a clear, glassy tip called a window. In the wild, the plant sits partly buried in the ground, and the windows let light into the leaf from above. On a windowsill, they glow when the light is behind them.

Care in a nutshell

  • Bright, but gentle. It copes with less light than most succulents, which makes it a good desk or shelf plant near a window.
  • Let it dry out. Water deeply, then wait until the soil is completely dry.
  • Share the pups. It forms offsets around the base. Separate them in spring once they have their own roots.

Watch out for

  • Soft, see-through leaves that collapse mean too much water. Healthy windows are clear but firm.
  • Red-brown color means it’s getting more sun than it likes. It isn’t dying; move it somewhere a little softer.

Fun fact: Several haworthias have leaf windows. It’s one of the ways small desert plants get enough light while staying hidden from the sun and from hungry animals.

Next steps

Learn the basics behind this care card, or check a problem.