How to Fertilize rhododendron 'Cowslip'?
Ericaceous fertilizer monthly from spring through late summer
rhododendron 'Cowslip' · Rhododendron 'Cowslip'
Grow in moist but well-drained, humus rich, acidic soil, in partial or dappled shade. Choose a site away from frost pockets. Mulch annually, ideally with leaf mould. See rhododendron cultivation for more detailed advice
Ericaceous fertilizer monthly from spring through late summer