How to Fertilize Rhododendron 'Robert Seleger'?
Ericaceous fertilizer monthly from spring through late summer

Rhododendron 'Robert Seleger' · Rhododendron 'Robert Seleger'
Grow in moist but well-drained, humus rich, acidic soil, in dappled or afternoon shade. Choose a site away from frost pockets and sheltered from strong winds, and do not allow plants to dry out. Mulch annually, ideally with leaf mould. See rhododendron cultivation for more detailed advice
Ericaceous fertilizer monthly from spring through late summer