How to Fertilize concave-leaf rhododendron?
Specialized rhododendron acid feed monthly spring extending to late summer months

concave-leaf rhododendron · Rhododendron davidsonianum
Also known as: Davidson rhododendron
Grow in moist but well-drained, leafy, humus-rich acid soil in part shade or in a sunny position if soil remains moist, with shelter; see rhododendron cultivation
Specialized rhododendron acid feed monthly spring extending to late summer months