Plant care guide
Sago Palm Identification: Know It, and Why It Is Toxic to Pets
Updated
How do you identify a Cycas revoluta?
Sago palm (Cycas revoluta) is a cycad, not a true palm: stiff, glossy, feather-like leaves rise in a crown from a shaggy trunk, with narrow leaflets that are spine-tipped and rolled under at the edges. Every part is poisonous, the seeds most of all, and it is highly toxic to dogs, cats and people.
What to do first
Check for stiff, spine-tipped leaflets with rolled-under edges and cones instead of flowers. If a pet chews any part of it, call your veterinarian or an animal poison control line right away; do not wait for symptoms.
Sago palm is widely grown as a houseplant, patio plant and bonsai. It is also a serious poisoning risk for pets, so it pays to recognize it on sight, including in a friend’s home or a garden center.
NC State Extension rates its poison severity as high. It notes that all parts contain the toxin cycasin, with the highest concentration in the seeds, and that pets are attracted to the plant.
Is it a palm?
No. University of Florida IFAS Extension explains that cycads such as Cycas revoluta are gymnosperms and unrelated to true palms, which are flowering plants. NC State notes that it produces cones with exposed seeds, much like pines and firs, rather than flowers.
How to identify a sago palm
| Feature | What to look for |
|---|---|
| Leaves | Feather-like (pinnate), glossy dark green and stiff, arranged in a rosette or crown at the top of the trunk (NC State) |
| Leaf size | NC State gives 0.9–2.1 m (3–7 ft) long outdoors; indoor plants are smaller |
| Leaflets | Many narrow, leathery leaflets, 7.5–15 cm (3–6 in) long, with spiny tips (NC State) |
| Leaflet edges | Rolled back or curled under. The name revoluta means “rolled back” (NC State, UF IFAS) |
| Lower leaflets | Often reduced to spines along the leaf stalk (NC State) |
| Trunk | Dark brown, thick and shaggy-looking (UF IFAS) |
| Growth | Very slow. UF IFAS gives up to 4.5 m (15 ft) in 50 years outdoors |
| Offshoots | Suckers form at the base (NC State) |
Cones are rare indoors, according to NC State. On mature outdoor plants, male and female cones grow on separate plants:
- Male: an upright, elongated yellow cone. UF IFAS gives up to about 60 cm (2 ft).
- Female: a golden, furry or feathery head in the center of the crown that holds bright orange to red seeds.
Look-alikes
- Emperor sago (Cycas taitungensis): UF IFAS Extension in Baker County describes it as very similar in appearance and use. It is normally single-trunked, while C. revoluta may branch and look shrubby when young.
- Other cycads: the ASPCA’s sago palm entry covers Cycas revoluta and Zamia species, which share the same toxin.
If a plant has stiff, spine-tipped leaflets with rolled-under edges and makes cones, treat it as a toxic cycad until you know otherwise.
Toxicity to pets and people
The ASPCA lists sago palm as toxic to dogs, cats and horses. The toxic principle is cycasin. Clinical signs it lists include:
- Vomiting.
- Black, tarry stools (melena).
- Yellowing of skin and gums (icterus).
- Increased thirst.
- Bloody inflammation of the gut (hemorrhagic gastroenteritis).
- Bruising and clotting problems.
- Liver damage and liver failure.
- Death.
NC State adds nosebleeds, bruising and blood in stools as pet signs. For people, it warns that ingesting any part may cause permanent internal damage or death, with vomiting, diarrhea, weakness, seizures and liver failure. UF IFAS notes that the seeds can poison both humans and animals.
If a pet chews any part of a sago palm, call your veterinarian or an animal poison control service immediately. Bring a piece of the plant or a photo. Do not wait to see whether the animal seems ill.
Living with a sago palm
- In a home with dogs or cats, the safest choice is not to keep one.
- If you keep one, place it where pets and children cannot reach it, and remove fallen leaflets, seeds and cones promptly.
- Wear gloves when handling it. NC State lists spines among its hazards.
For care, NC State recommends bright but indirect light, about 4–6 hours of filtered sun a day for indoor plants, and moist, well-drained soil. It does not tolerate overwatering or poor drainage. The University of Illinois Extension lists sago palm among medium-light houseplants.
For pet-safe alternatives, see our pet-safe plants guide.
References
- NC State Extension Gardener Plant Toolbox: Cycas revoluta
- ASPCA Animal Poison Control Center: Sago Palm
- University of Florida IFAS Extension, FOR 254/FR316: Cycas revoluta, Sago Palm
- University of Florida IFAS Extension, Baker County: King Sago Palm and Emperor Sago Palm (2013)
- University of Illinois Extension: Houseplants, Lighting
How this guide was put together: Identification from NC State Extension and University of Florida IFAS Extension; pet toxicity from the ASPCA Animal Poison Control Center and NC State Extension.