Australian Grey Ironbark Tree (Eucalyptus Drepanophylla) The Grey Ironbark is one of our most valuable coastal nectar producing Eucalypts. Growing up to 25 metres high and with the typical dark coloured, deep furrowed bark, the Grey Ironbark's flower from July through to December, depending on the conditions. With a distinctive white flower, this honey has excellent colour and flavour, and being an extra light amber, is sort after as one of the Premium Coastal Table Grade Honeys.