Graded S0–S4 · Sourced from veterinary toxicology

Will this plant
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THE SEVERITY INDEX

every plant on this site carries one grade
S0 — Safenon-toxic on record
S1 — Cautionmild upset
S2 — Irritantirritant; watch for signs
S3 — Toxiccall your vet
S4 — EmergencyER, now

In the index

All 107 plants →

Azalea

Rhododendron spp.
S4 · EMERGENCY

Carolina Jessamine

Gelsemium sempervirens
S4 · EMERGENCY

Daylily

Hemerocallis spp.
S4 · EMERGENCY

Desert Rose

Adenium obesum
S4 · EMERGENCY

Lily

Lilium spp.
S4 · EMERGENCY

Sago Palm

Cycas revoluta
S4 · EMERGENCY