On 11/30/2012 04:56 PM, rbel wrote:
The Acer is a Sango Kaku (therefore probably somewhat tender) and is
not grafted.

Sango Kaku is particularly susceptible to moisture related bark
problems, but other than that it's not particularly tender. The main
issue with cold will be dieback of small branches that don't ripen
sufficiently in our dreary climate... but where you are it won't have
to worry about the cold. The wind is another issue, Sango Kaku does
have wind burn problems.

Are you sure it's not grafted? There is a Dutch nursery selling rooted
cuttings now, but there weren't many around 5 years ago. You may have
gotten one of the early ones. They are murder to get to strike, I used
to see rates quoted around 1%!