About Rhododendron Festival...Thousands of world-famous rhododendrons in over 100 varieties offer an explosion of spectacular blooms throughout Heritage. Enjoy a peaceful walk surrounded by walls of flowers, learn more about Heritage’s storied rhododendron legacy, participate in activities with horticulture experts, and take home one of these signature plants from the special plant sale. All programs are free with museum admission. No advance registration required. Daily Rhododendron Collection Walking Tour.Saturday, May 26 – Sunday, June 3,11:30 am-12 pm and 2 pm-2:30 pm. Take a deep dive into the world of rhododendrons. Discover how the work done by two hybridizers—Charles Dexter and Jack Cowles—contributed to the genus Rhododendron and created the plants that are so loved today. Guides will select the most spectacular spots for viewing these stunning plants daily. Tours meet at the Dexter Terrace. Rhododendron Care Walk and Talk, Sunday, May 27: 1-1:45 pm, Tuesday, May 29: 10:30-11:15 am, Thursday, May 31: 10:30-11:15 am, Saturday, June 2: 10:30-11:15 am Heritage’s Horticulture staff share the basics on how to maintain and care for your rhododendrons. Included are demonstrations of ideal growing situations, watering, fertilizing, mulching, pest control, pruning, bud-pinching, and dead-heading to encourage optimal health and beauty. Rhododendron Pruning Demonstration. Saturday, May 26: 10:30-11:15 am, Wednesday, May 30: 1-1:45 pm, Friday, June 1: 1-1:45 pm,Sunday, June 3: 1-1:45 pm. Join Heritage Horticulture staff to learn how to selectively prune your plants to improve vigor, increase bloom density, control height, and enhance ornamental value. Discuss the tools, techniques, and timing needed for effective pruning and watch a demonstration of techniques on various plants during a walk through the garden.