SlightLy,off topic, how deep are the roots on holly???
That's right on topic Mark but I don't know, sorry
Sorry Mark I haven't got an answer either but I assume that the bigger the tree is the larger and deeper the root system will be. Just wondering if you are thinking of planting one or digging one up
Digging one out
Bearing in mind that Holly trees grow in exposed places and that they are evergreen [ present much more of a surface for the effect of winds] I think they must have a very robust root system. You rarely see them blown down.