Rhododendron ( Golden Sunset Knap Hill Azalea )
Knap Hill / Exbury hybrid are English - bred crosses . Trusses of up to 30 cornet - mould flowers , each to 3″ wide , are hold in mid to late spring . The deciduous hybrid azalea , like its aboriginal opposite number , is hump for excellent fall color and unexcelled spring flowers . The deciduous azalea is ordinarily less picky about soil conditions , though it too prefers acid conditions ....