How to Fertilize rose 'Dortmund'?
Apply a rose-specific fertilizer in spring and after each bloom flush.

rose 'Dortmund' · Rosa 'Dortmund'
Grow in full sun with fertile, humus-rich, moist but well-drained soil. For best flowering apply a balanced fertiliser and mulch in late winter or early spring and a balanced fertiliser again in early summer - see rose cultivation. Tolerant of poor soil, shade and a north aspect
Apply a rose-specific fertilizer in spring and after each bloom flush.