[Rally]

[quote author=stupac2 link=topic=12914.msg130468#msg130468 date=1443195665]
Sort of related, the house I bought this year has two of exceedingly large proportions redwoods in the back yard. There's nowhere that I can stand (including on my roof) where I can see their tops. I'd love to know how tall/old they are, but I'm not sure how to do that. I really like having them around (though it's too bad they're on the north line so they don't give a ton of shade), but holy crap do they drop a lot of cones/twigs/branches. It's like the pine trees I grew up with on the east coast, but times 20.

Measure your trees' shadows while measuring the shadow of an object of known height.  The shadows are proportionate to their height, so your trees' height = trees shadow length * object height / object shadow length.

BC
[/quote]

Whatever you do don't cut them down.  Our daughter's home in Pacifica has a redwood that a previous owner had cut down.  They have a rapidly spreading redwood forest trying it's best to take over the back yard.

[Rally]

[quote author=stupac2 link=topic=12914.msg130468#msg130468 date=1443195665]
Sort of related, the house I bought this year has two of exceedingly large proportions redwoods in the back yard. There's nowhere that I can stand (including on my roof) where I can see their tops. I'd love to know how tall/old they are, but I'm not sure how to do that. I really like having them around (though it's too bad they're on the north line so they don't give a ton of shade), but holy crap do they drop a lot of cones/twigs/branches. It's like the pine trees I grew up with on the east coast, but times 20.

Measure your trees' shadows while measuring the shadow of an object of known height.  The shadows are proportionate to their height, so your trees' height = trees shadow length * object height / object shadow length.

BC
[/quote]

Whatever you do don't cut them down.  Our daughter's home in Pacifica has a redwood that a previous owner had cut down.  They have a rapidly spreading redwood forest trying it's best to take over the back yard.