How to Fertilize many-flowered rose?
Rose diluted bloom fertilizer applied monthly spring until late summer end

many-flowered rose · Rosa multiflora
Also known as: baby rose; bramble rose; Japanese rose
Grows best in fertile, humus-rich, moist but well-drained soil in a sunny, open position, but tolerates a wide range of conditions. Mulch in late winter and, to improve flowering, apply a balanced fertiliser in late winter or early spring
Rose diluted bloom fertilizer applied monthly spring until late summer end