How to care for Haworthia Cooperi
Haworthia cooperi · Asphodelaceae
A jewel-like rosette of plump, translucent leaves with glassy 'windows' at the tips that let light into the leaf interior. In habitat it grows mostly buried, with only the windows exposed, which explains its tolerance of soft indoor light. It slowly clusters into a pot-filling colony of glassy green orbs. Water roughly every 14 days while it's growing (about every 30 in winter), give it bright, indirect light, kept above 45°F (7°C) — dry air is fine for it.
Care at a glance
Water deeply when the soil has dried completely; the translucent leaves dim and pucker slightly when the plant needs water.
Bright indirect light makes the leaf windows glow; direct sun turns it stressed shades of red and can scorch the glassy tips.
Quarter-strength cactus fertilizer once or twice a year.
Mistakes that kill this plant
- Frequent watering — its fat leaves and thick roots store months of reserves.
- Full-sun placement, which cooks the translucent tissue.
- Deep, peaty pots that keep the roots damp and airless.
Seasonal tips
- Its main growth happens in the cooler months — water a bit more in spring and fall than midsummer.
- Shield it from intense summer sun; it may rest and dull slightly in heat.
- Divide crowded clumps every few years to keep rosettes plump.
Is it safe for pets?
Our records list Haworthia Cooperi as non-toxic to cats and dogs.
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Toxicity here is informational, not a safety guarantee. Those are our own records, compiled by following the ASPCA's published toxic and non-toxic plant lists and Pet Poison Helpline's plant poison list rather than copied from them — confirm anything that matters against the ASPCA's published lists, which this one is matched to, or with your vet. If your pet ingested this plant, contact your vet or the ASPCA Animal Poison Control Center at (888) 426-4435.