How to Fertilize Rosa 'Mariae-Graebnerae'?
Rose fertilizer every two to four weeks from spring through late summer

Rosa 'Mariae-Graebnerae' · Rosa 'Mariae-Graebnerae'
Grow in fertile, humus-rich, moist but well-drained soil in full sun or part shade. Suited to edge of woodland planting. 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