Dicksonia antarctica, on the other hand, came through last winter in good shape. All the top growth was completely frosted but the trunk and new croziers survived -8C without protection. I've had this one for about 9 years now. I bought it a as a tattered baby, no trunk, half a dozen fronds, discarded in an end of season garden centre sale. £2 it cost me. It's now considerably larger.
How much larger became fairly obvious when I cleared the dead fronds earlier this year. It's managed about 32in / 81cm of trunk growth in 9 years. In it's early years it wouldn't have made much growth so a better measure is gained by comparing these two photos. The first I took in June 2007, the other this morning.
Here's a photo of the whole plant. The fronds are still unrolling so it's not quite at full extension and, with the loss of last years growth, the head isn't as full as it will hopefully be by late summer.
It's in an area of the garden that I'm now busily renovating - but it will be one of the centrepieces in the finished layout.
A final word:
Yes, I could have bought a trunked plant, unrooted or rooted. But I didn't have the money. At around £40 per foot a 4 ft plant (the extra would be needed for planting to ensure stability) was beyond my plant buying budget at that time. It still is.