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

soft rhododendron · Rhododendron molle
Grow in moist but well-drained, humus rich, acidic soil, in sun or light shade. Choose a site away from frost pockets and sheltered from strong winds. Mulch annually, ideally with leaf mould. See rhododendron cultivation for more detailed advice
Ericaceous fertilizer monthly from spring through late summer