The Riverside/San Bernardino Chapter of the California Native Plant Society will hold its Spring Native Garden Ramble, a free tour of gardens in Redlands and Riverside, Saturday, May 11. Registered participants may visit four Redlands gardens between 9 a.m. and 11:30 a.m. and six Riverside gardens between 11 a.m. and 3 p.m. The gardens will feature California native plants in bloom. Gardens on the tour range from recently planted to up to 20 years old, and the tour offers an opportunity to learn about native plants and how they support the local ecosystem, according to a news release. To register, go to bit.ly/4akM63x. Ticketholders will receive maps and addresses the day before the event. For information, go to riverside-sanbernardino.cnps.org/index.php/events.