April 21st thru May 21st - Rain Barrel Event! Pick up your coupon for $20 off 1 rain barrel at City Hall in Coralville, Iowa City & North Liberty, as well as the Johnson County Administration Building. Then bring your coupon to Orscheln Farm & Home in Iowa City to receive $20 off 1 rain barrel! The coupons will be valid from April 21 to May 21, 2015. Don't miss your chance to save on a rain barrel!