The Greyboy Allstars, Stephen Marley, and Martin Sexton have been added to RatDogs previously confirmed Green Apple performance at San Franciscos Golden Gate Park on April 22. The multi-band bill is part of Green Apples tri-city Earth Day celebration, which includes a similar free show at Chicagos Lincoln Park Zoo featuring Umphrey’s McGee, the Disco Biscuits, Todd Park Mohr, and Mad Professor, among others. Noted childrens artist Laurie Berkner will also perform a free Earth Day show at New Yorks The Great Hill in Central Park on April 22. After wrapping up their Golden Gate Park shows, Stephen Marley and the Greyboy Allstars will perform club shows at San Franciscos Fillmore Auditorium and the Independent, respectively. The recently reunited Greyboy Allstars will release their next studio album, What Happened to TV?, on April 17.