Tower Hill Botanic Garden, 11 French Dr., Boylston, will hold its annual plant sale June 1. For the earliest selection, a Preview Party and Sale with special guest Roger Swain takes place the evening of May 31. Tickets are $45 ($35 for members), and includes hors d’oeuvres from Pepper's Fine Event Catering and a cash bar. Call 508-869-6111 ext. 136 or visit www.towerhillbg.org for tickets and information.