How to Fertilize Rosa 'Plentiful'?
Rose bloom fertilizer every two to four weeks spring through late summer

Rosa 'Plentiful' · Rosa 'Plentiful'
Grow in fertile, humus-rich, moist but well-drained soil in full sun. 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 bloom fertilizer every two to four weeks spring through late summer