Chipped Bark Mulch - Not recommended for Roses. Aug 29, 2020 9:49:02 GMT Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Garden Care on Aug 29, 2020 9:49:02 GMT If mulching around Roses use well rotted manure. Avoid chipped bark, as the bark breaks down it prevents nitrogen being avalable to the Roses.