jagged ambush bug Backyard Almanac - patches of goldenrod: "there's crazy critters in there!" By Lisa Johnson • Aug 25, 2017 ©Sparky Stensaas. Used with permission. Special guest star Sparky Stensaas sits in for Larry Weber this morning, and talks about one of Larry's favorite plants: the much-maligned goldenrod. For one thing, Larry says most people aren't allergic to goldenrod; they're allergic to ragweed.