How to Fertilize rose 'Polyantha Grandiflora'?
Rose fertilizer every two to four weeks from spring through late summer
rose 'Polyantha Grandiflora' · Rosa 'Polyantha Grandiflora'
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 fertilizer every two to four weeks from spring through late summer