Buckeye trees (Aesculus spp.) are ornamental shade trees in parks, neighborhoods, and school grounds. They produce spiky green husks that split open in fall and release glossy brown seeds called buckeyes or conkers. Seeds, leaves, bark, and young shoots contain toxic compounds including aesculin and related glycosides.
In many areas, people collect buckeyes for crafts, game pieces, and seasonal decor bowls. Seeds are often left on porches, entry tables, or workshop shelves while they dry. Yard cleanup can also leave husks and seeds in leaf piles, compost edges, or open waste bins where pets may investigate. These trees are often planted near sidewalks, driveways, and shared green spaces, so fallen seeds can roll into patios or dog runs. The glossy seeds are smooth and toy-like, which may encourage mouthing.
Exposure is most common after storms, mowing, or pruning when plant debris is scattered at ground level. Even a small amount of chewed seed may trigger vomiting, drooling, diarrhea, weakness, or neurologic signs. Prompt removal of fallen material helps reduce risk. Keep buckeyes and trimmings out of reach and contact a veterinarian or poison service if ingestion is suspected.
