String of buttons
Crassula perforata
Thick, triangular grey-green leaves with pinkish edges stack in pairs along the stem.
Find its rhythm
Light
Bright light to sun; acclimate gradually
Water
Allow the potting mix to dry before watering thoroughly. Do not leave water in the saucer. Start with a soil check every 14 days and adjust for your conditions.
Care through the seasons
Soil & drainage
Use a gritty, freely draining cactus or succulent mix.
Climate
Provide airflow; check species hardiness before leaving outside in cold weather.
Seasonal care
Dormancy varies by species. Reduce watering when growth stops; avoid a fixed year-round schedule.
Feeding
Use a light feed during active growth only, according to the label.
Pruning
Remove dead material carefully. Protect skin from spines and irritating sap.
Propagation
Stem cuttings
Hardiness
9a, 9b, 10a, 10b, 11a, 11b, 12a, 12b
Watch for
Rot in wet soil · Stretching in low light · Sun scorch after a sudden move
Care-group starting guidance; adapt to your cultivar and local climate.
Pet & child safety
Not in the ASPCA list — treat it as unsafe until you know more
Non-toxic to children (California Poison Control)
California Poison Control lists the genus Crassula as a whole, not this species by name.
Non-toxic doesn’t mean safe to eat: any plant can still upset a stomach or be a choking risk.
Keep plants out of reach of children and pets. Never eat a plant based on an app.
If any is eaten: Call your local poison control centre or vet. In the US: Poison Control 1-800-222-1222; ASPCA Animal Poison Control (888) 426-4435 (a fee may apply).
Sources checked 10 Nov 2026. Lists change, so check the source before relying on it.