Well winter arrived in Canberra this week. It does not seem to creep in but arrive with a whammy. I got my tree dahlias to full seasonal mature height of 10 feet this year, and 40% flowers opened. They will tolerate some frost, my reckoning is to about -3 degrees celsius. The first below zero night we had was -5 degrees celsius - too cold. The bright green leaves are now a murky black and they will have to be chopped down. Marginal here, but so worth a try. The photo above was taken in my Adelaide garden in May 2005 where they thrive and look stunning against the autumnal blue sky.
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