Ice smooth 2-layer cake (bake two 1 1/2 in. high layers to make a 3 in. high cake). Tint 8 oz. fondant dark rose, 6 oz. light rose and a 1 1/2 in. ball light green; reserve remainder white. Roll out light rose fondant 1/8 in. thick; cut two 1 x 15 in. long strips. Position strips flat around top border of cake; trim to fit heart shape.
fondant ribbon roses in dark rose. Attach flowers to top edge of cake with damp brush. Roll out light green fondant 1/8 in. thick. Cut 20 leaves using smallest Cut-Out. Place leaves on thin foam and score vein lines with veining tool. Attach with damp brush. Roll out light rose fondant 1/8 in. thick. Cut 1/4 in. wide strips; position on cake to form message. Roll 1/2 in. balls of white fondant and attach to bottom border with buttercream.