Posted: 03/07/2016 at 18:49
I am on my 3rd - and last - gunnera. The last two have been frozen to death by surprise -8C frosts in October. They had coped with much colder winters when, with advanced warning, I covered their crowns with old foliage and then buried them under a 3' heap pf garden compost.
This one has been grown on in a pot and re-potted each spring until this year. The idea was that once the pot got too big to move to the greenhouse for winter the gunnera would be better suited to surviving in the pond edges. However, we've decided move so it's still in its pot and will come with us. The trick is to keep it well watered. They go limp if too dry and that's not a good look in a pot.
For a similar look on a smaller scale you could go for the ornamental rhubarb.