The Water Resources Education Center, 4600 S.E. Columbia Way, Vancouver, invites volunteers to clean up its gardens from 9 to 11 a.m. Sept. 21. Volunteers will weed, spread mulch, trim plants and rake. All tools will be provided. Volunteers should bring gardening gloves. Register at cityofvancouver.us/publicworks/page/water-center-garden-cleanup-1.