How to Fertilize dog rose?
Rose fertilizer every two to four weeks from spring through late summer

dog rose · Rosa canina
Also known as: bird briar; briar rose; buckieberries; canker; canker flower; canker rose; cankerberry; choop tree; common brier; dog briar; dog brier; hep briar; hep rose; hep tree; wild rose; cat whin
'Dog Rose', a wild rose native to Britain with abundant orange-red hips in autumn. Grow in full sun or part shade in moderately fertile, humus-rich, moist but well-drained soil. For best flowering apply a balanced fertiliser and mulch in late winter or early spring. Tolerant of poor soil and north-facing locations. See rose cultivation for further advice
Rose fertilizer every two to four weeks from spring through late summer