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Being one of the later-flowering large-leaved species, we can continue to enjoy these until October, when they will unfurl in all their creamy yellow glory. However, we don't need to wait that long to delight in the blooms of some of the other large-leaved rhododendrons.
At the Dunedin Botanic Garden, the earliest flowering of these rhododendrons is on the edge of the track between the north bridge and the Cherry Walk in the Rhododendron Dell.
This is a group of R. magnificum hybrids which, in fact, began flowering in mid July.
Although flowering follows the typical period of July to September for R. magnificum in New Zealand, the colour is not typical. The true species has deep rose to rich purple flowers. But the specimens in the Dell open deep rose and then fade to creamy yellow, tinged pink. The yellow colour likely comes from cross-pollination with
R. macabeanum, whose flowering time overlaps with
R. magnificum. Consequently, although the seed parent of these R. magnificum specimens may have been true, the offspring betray their hybrid origin.
Opening so soon, the flowers are prone to damage by early frosts, but as long as they survive the elements unscathed we can continue to admire them well into spring.
-Garden Life is produced by Dunedin Botanic Garden. For further information contact Doug Thomson.