How to Fertilize Rhododendron 'Martha Wright'?
Ericaceous fertilizer monthly from spring through late summer

Rhododendron 'Martha Wright' · Rhododendron 'Martha Wright'
In mild, frost-free areas, may be grown outdoors in a sheltered position, in moist but well-drained, humus rich, acidic soil. Position in partial or dappled shade, and add an annual organic mulch (ideally leaf mould). In colder areas, this cultivar is best grown under glass in ericaceous compost. See rhododendron cultivation for more detailed advice
Ericaceous fertilizer monthly from spring through late summer