In article , Bill Bushnell
writes
With such a fast-growing tree that when mature can be 40m tall, is trimming a practical
solution?

Does anyone have additional advice?

The one in my garden (UK) looks a bit different - perhaps not quite as
tall as the Sunnyvale example, but with a much bigger trunk and crown. A
lot of the branches seem more horizontal in aspect rather than the
comparatively vertical in your pics. This seems to have helped it have
a much more open crown, thus spreading wider rather than grwoing so
tall.

Might be the weather; might be a different variety; might be sex?

Anyway, we tend to have it trimmed every couple of years which seems to
encourage the spread rather than the height and open out the crown.

The other thing is that it looks rather close to the neighbour's house.
If it was my house, I wouldn't want it there. Mine is about 20' from
the house - but also on ground 5' higher than the house.

--
regards andyw