How to Fertilize rhododendron 'Sappho'?
Apply an acid-forming fertilizer in spring and again after flowering.

rhododendron 'Sappho' · Rhododendron 'Sappho'
Grow in moist but well-drained, leafy, humus-rich acid soil in part shade with shelter, suitable for a sunny situation if soil remains reliably moist; see rhododendron cultivation
Apply an acid-forming fertilizer in spring and again after flowering.