Fir tree close to retaining wall
I have a Douglas fir growing at the back of my garden about 30cm away from a retaining wall. The wall has developed a slight lean and is in need of repointing. It’s not 100% clear but the tree is probably to some extent to blame although I’m afraid I have let the brickwork get into bad condition. The other side of the wall drops about 6ft to an alleyway (about 4 foot of wall is retaining). The fir is approx. 35ft high (having been reduced by ten foot or so earlier this year after neighbours worried that it was swaying too wildly in their direction).
The brickie says he can repoint the wall with the tree in situ and as I am rather attached to the tree and generally don’t like cutting things down, I am inclined to let him go ahead with this.
My question is this: with the tree reduced in height, is the root system still expanding? If so, then I guess in repointing the wall with the tree still standing I am just delaying the inevitable and should go the whole hog and have the poor tree cut down.
But if the root system is likely to be as big as it will ever be then I’ll keep the tree and strengthen the wall.
Many thanks for any suggestions, advice or stories of similar problems!