How to Fertilize Brown's rose?
Rose fertilizer every two to four weeks from spring through late summer

Brown's rose · Rosa brunonii
Also known as: Himalayan musk rose
Grow in fertile, humus-rich, moist but well-drained soil in full sun, in a warm sheltered position. Best suited to southern counties. Good for climbing into large trees. Mulch with well-rotted organic matter in late winter or early spring, and for best flowering apply a general rose or shrub fertiliser in early spring and again in early summer. See rose cultivation
Rose fertilizer every two to four weeks from spring through late summer