Are Sunflower Leaves and Petals Toxic?
By: Jessie Keith
“Are the petals and leaves of garden sunflower blooms toxic to eat?” Question from Caroline from Evansville, Indiana
Answer: Stick to the seeds when it comes to eating sunflowers. The flowers and leaf and stem hairs contain a mixed bag of chemicals called sesquiterpene lactones that commonly cause bad reactions in humans–both on the skin or if ingested. In fact, they commonly cause dermal allergies, so it’s smart to use gloves when cutting stems for arrangements.
These chemicals can also poison cattle. According to the Canadian Poisonous Plants Information System, cattle poisoned by sunflowers show the following symptoms: “circulatory failure, swaying of hind quarters, excitation, and collapse 1-3 h after ingestion. Postmortem findings include lung edema, small hemorrhages and congestion of intestinal blood vessels, and dark- colored blood (Cooper and Johnson 1984).” YUCK!!!
Fully matured sunflower seeds do not contain these bad chemicals, but immature seeds can, so be sure seed heads are fully mature and dry before harvesting any sunflower seeds for eating.
This site may contain content (including images and articles) as well as advice, opinions and statements presented by third parties. Sun Gro does not review these materials for accuracy or reliability and does not endorse the advice, opinions, or statements that may be contained in them. Sun Gro also does not review the materials to determine if they infringe the copyright or other rights of others. These materials are available only for informational purposes and are presented “as is” without warranty of any kind, express or implied, including without limitation warranties of merchantability, fitness for a particular purpose, and non-infringement. Reliance upon any such opinion, advice, statement or other information is at your own risk. In no event shall Sun Gro Horticulture Distribution, Inc. or any of its affiliates be liable to you for any inaccuracy, error, omission, fact, infringement and the like, resulting from your use of these materials, regardless of cause, or for any damages resulting there from.