How to Fertilize field rose?
Rose bloom fertilizer every two to four weeks spring through late summer

field rose · Rosa arvensis
Also known as: briar; briar bush; brier; briar rose
Ideal for groundcover or rambling. Grow in full sun with shelter, 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 shade; good for woodland or hedgerow planting. Good for ornamental fruits. See also rose cultivation
Rose bloom fertilizer every two to four weeks spring through late summer