The new cultivar'Diehai'was bred through natural pollination and seeding seletion of Rhododendron pulchyrum.It is characterized by compact plant type,vigour growth.Its flower color is purple red(Red Purple Group N57C).Its flower is single and its petal has five circular lobes,its upper lobes have some striking dark purple spots.The diameter of flower head is about 7.5-8.0 cm.Its natural florescence is from early April to mid April.Its flowering can last 15-20 days.It is high temperature and high humidity tolerance.It is suitable for greenhouse pot and landscape for the middle and lower reaches of the Yangtze River.
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