How to Fertilize Helen's rose?
Rose feed in spring and after each major flush

Helen's rose · Rosa helenae
Needs a sheltered position in full sun or light shade, 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. Tolerant of a north-facing aspect, suited to training into a large tree. See rose cultivation
Rose feed in spring and after each major flush