The free event, which is presented by the Bergen County Audubon Society, will include guided butterfly walks throughout the afternoon.
There will also be a table with butterfly and plant information, how to start your own butterfly garden, and other informative handouts.
The $5 parking fee applies to New Jersey cars; parking is $7 for out-of-state cars.
The event will be from noon-3 p.m.
The New Jersey Botanical Garden is at 2 Morris Road, Ringwood.
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