We recommend garden attire: think light, semi-formal outfits suitable for outdoor terrain. For example:
Women: sundresses, midi dresses, or dressy separates with flat or low-heeled shoes (or wedges).
Men: lightweight suits, dress slacks with a blazer, or dress shirts with chinos. Tie optional.
Please avoid formal ball gowns, tuxedos, and high stilettos that sink into grass. Feel free to bring a light layer in case it gets cool.