How to Fertilize rhododendron 'Persil'?
Ericaceous fertilizer monthly from spring through late summer

rhododendron 'Persil' · Rhododendron 'Persil'
Suitable for an open site but best grown in moist but well-drained, leafy, humus-rich acid soil in part shade with shelter; see rhododendron cultivation
Ericaceous fertilizer monthly from spring through late summer