Can the roots of my Foster Holly Tree damage the foundation of my house? A tree guy keeps stopping at my house to tell me that I need to take down my Foster Holly Tree because it's planted too close to the house and the roots will damage the foundation. I don't know whether he's telling the truth or whether he just wants work. The tree is mature approximately 15-20' tall, and it's planted about 6' from the corner of my house. It is in need of trimming, but I have absolutely no idea whether I need to be concerned about it damaging the foundation. Thanks for your help.
This particular holly causes more damage than any other I have seen. Being such a large tree, the roots are highly invasive. Along with your foundation... The roots can crawl into water lines, and septic systems. If he is a professional in this subject, then it is best to let him diagnose this and repair any damage already done. If this continues to grow like in this fashion, then it can cause irreparable damage over time.
It is very common for this particular holly to be, mistakenly, planted to close to structures, as most people are expecting it to remain a shrub as many varieties of Hollies do.
I asked my lawn care service company to trim my shrubs and they lopped the top off of my one year old Fosters Holly. Is that going to be a problem?
It will come back with a vengeance. Holly's are incredibly hardy, and will respond to pruning by doubling in growth rate.
They did the right thing, as long as they did not go below the halfway point of the actual trunk.
Typically, these Holly's are grafted so the root will be a different type of Ilex. Keep any growth from the root zone pruned away. You only want growth from above the graft zone. This is usually visible as an add line all the way around the trunk about halfway up. Anything below that line needs to be taken off as it shows up.
Here is an article for more information on the care of the tree:
https://www.gardeningknowhow.com/ornamental/shrubs/holly/growing-holly-bushes.htm