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A workshop sponsored by Citizens’ Greener Evanston and Evanston TreeKeepers will help gardeners get ready for spring. The workshop, to be held 2-4 p.m. on March 7 at the Levy Center, 300 Dodge Ave., will cover planning and caring for the green spaces in a way that supports birds, bees and butterflies. Attendees will learn how a habitat that helps the “3 Bs” is also healthier for people, good for business and better able to weather the climate changes ahead.