How to Fertilize Rosa 'Treasure Trove'?
Rose specific feed every two weeks from spring bud break till late autumn

Rosa 'Treasure Trove' · Rosa 'Treasure Trove'
Grow in fertile, humus-rich, moist but well-drained soil in full sun or part shade, ideal for north-facing situations or growing into large trees. 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 specific feed every two weeks from spring bud break till late autumn