A University of British Columbia Botanical Garden Introduction. A seedling selected in the garden from seed sent from Choillipo Arboretum, South Korea. The pastel yellow pendulous 2" (5cm) flowers are a darker wine red at the base. These very attractive flowers are produced on the previous season's wood in May and June with some flowers during thes ummer, followed by very attractive seed heads. Mature height 6.5-10' (2-3m). Hardy to Zone 6Pruning group A