The 81st annual LIDS Dahlia Show and Competition returns to Bayard Cutting Arboretum! Marvel at spectacular dahlia blooms in every color and size, entered by growers from across Long Island. Whether you're a gardening enthusiast or simply love beautiful flowers, this free event is a perfect way to welcome early fall at one of Long Island's most beautiful public gardens.

Registration for competition entries takes place September 3–4.

When: September 5, 2026, 2:00 PM – 5:00 PM & September 6, 2026, 9:00 AM – 3:00 PM
Where: Bayard Cutting Arboretum, 440 Montauk Hwy, Great River, NY 11739
Cost: FREE
Note: Competition entry registration September 3–4.