Wallflowers (Cheiranthus/Erysimum): Safety Profile for Homes and Gardens

Wallflowers (genus Erysimum, formerly Cheiranthus) are popular fragrant biennial/perennial garden plants. Their safety profile:

Toxicity

• Humans: Generally considered non-toxic. No significant poisoning reports from incidental ingestion of flowers/leaves. Large quantities may cause GI upset (nausea, vomiting) due to glucosinolates (mustard oil glycosides).
• Pets (Dogs/Cats): Not listed as toxic by ASPCA. Mild GI upset possible if large amounts eaten. Monitor for vomiting/diarrhea; usually self-limiting.
• Livestock: Can cause goitrogenic effects (thyroid enlargement) if consumed in large quantities over time due to glucosinolate hydrolysis products (thiocyanates). Not a typical grazing risk.

Allergenic Potential

• Fragrance (volatile organic compounds) may trigger respiratory irritation in sensitive individuals (asthma, fragrance sensitivity).
• Contact dermatitis rare but possible (sesquiterpene lactones in some Brassicaceae).

Cultivation Notes

• Cool-season bloomers (spring); full sun, well-drained soil.
• Short-lived perennials often grown as biennials.
• Self-seed readily; not invasive in most regions.

Confusion Alert

Do not confuse with Wallflower (Bath & Body Works plug-in fragrance) – synthetic scented oil diffuser. Those can cause respiratory irritation in sensitive people/pets. The plant is safe.

As with any plant, supervise young children/pets; teach not to eat ornamental plants. If ingestion occurs and symptoms develop, contact Poison Control (1-800-222-1222) or veterinarian.