The circumstances of the this kind of tree matter. "Planted" douglas firs in
a yard will develop independent storm sturdy root systems. Douglas firs in
northwestern forests are almost always part of dense stands with
interlocking root systems. It has been common in many of the newer housing
developments, to clear cut douglas fir forests, leaving only a few specimens
here and there for "interest". These trees are VERY susceptible to blowing
over in storms, which they do with great regularity every winter. Ultimately
they will all fall, leaving a lot of people with damaged homes and yards and
higher home insurance rates. In that circumstance, I'd probably opt to have
the douglas fir removed, rather than try to prune it.
"peter" wrote in message
news:x8egd.5308$jD4.284@trnddc06...
Are there resources on the web on how to prune a douglas fir tree (about
70
feet tall) to prevent wind damage?