Farmer J.
Well-known member
There is a group of big Douglas Firs about twenty miles from my house as the crow flies. The largest tree there blew down in 1981 and it was about 230 ft. tall and 34.5 ft. in diameter. At the time, it was the second-largest Douglas Fir known. It was in an area that gets about 12 feet of rain per year. That is feet of rain!
https://en.wikipedia.org/wiki/Valley_of_the_Giants_(Oregon)
Douglas Fir trees grow tall and straight when in a uniform stand. They compete for sunlight, so they try to get taller than the others. If they don't have to compete, like the one at the edge of my field, they grow bushy, shorter, and the trunks taper a lot.
I think that 200-250 feet tall is about maximum for Douglas Fir, and probably is limited by the ability of the trunk to carry water to the top. Coast Redwoods get taller.
Thanks for that info too, all very interesting. We're rather getting off the thread of toolboxes, so i will try and send you a PM in the next few days if I can find my old map and diary...




