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
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.
When you see a large tree blown over, I am always surprised by how shallow the roots are. I think they mainly have a good hold on the soil, because they have so many roots, not because they go very deep.
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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.