The annual “Drumthwacket in Bloom: Garden Party Open House” is Sunday, June 2 from 1-3 p.m. at the historic home that serves as the New Jersey governors’ mansion on Stockton Street.

The day will include garden tours of Moses Taylor Pyne’s Italianate gardens designed by Daniel Webster Langton in 1905, led by Mercer County Master Gardeners. The house will be open for tours. Olden House, the 18th century home on the property, will also be open for tours.

Children’s activities will focus on learning about New Jersey and its state symbols. There will be beekeeping demonstrations by Ken Walters of The Yellow Bee. Honey Brook Organic Farm representatives will talk about the New Jersey state fruit and their local farming and sustainability initiatives.

Reservations are required. The suggested donation is $5, which will be donated to the Drumthwacket Foundation. Call (609) 683-0057 ext. 5 or visit www.drumthwacket.org.