With 20 formal gardens covering 96 acres, this rather large botanical garden requires a bit of time to visit properly. You’ll find something in bloom at almost any time of year, and even in winter the Japanese garden offers a tranquil setting for a quiet stroll. In April and May, the Ketchum Memorial Iris Garden, one of the largest in the country, is in bloom, and during May, June, and September the Municipal Rose Garden is alive with color. A special Sensory Garden is designed for people with disabilities and has plantings that stimulate all five senses. For kids there is a family garden, My Big Backyard, a space that includes a children’s museum, playground, outdoor art gallery, and interactive gardening display. Allow at least 2 hours.