All are well over 6 feet in height and the Excelsa and the Tenuicaulis have been flowering for months now. The Imperialis, which is the largest, hasn’t flowered as yet and is unlikely to- in fact it has only flowered outside in this garden once- and that was after the exceptionally hot summer of 2006, when it came into flower on December 6th. Unfortunately it seems that not all species Dahlias are frost resistant- the smaller varieties, such as Coccinea have succumbed, just like the hybrids.
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