In article , says...
On 2011-01-15 14:46:45 +0000, "Peter" said:

I have a Monkey Puzzle tree that is now blocking a path. When is the
right time of year to prune it and is there anything I need to know?
Thanks

All you can do is remove the lower branches. You can't 'prune' one of
these. There's a wonderful avenue of them at Bicton College in Devon.
They were planted in 1843 and the largest has a trunk girth of 13' and
is 85' tall so they're not something for a restricted space.

Indeed, I think these are the second oldest in the country having been
part of the first batch of seed sent back by William Lobb to Veitches,
the oldest are at Penjerrick as these were brought/sent back by Charles
Darwin from his trip on the Beagle 1831-1836
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea