Root guide
Are Oak Tree Roots Invasive?
How far oak roots spread, and what they can and cannot damage.
Some trees keep coming back: suckers from the roots, seedlings in every bed, or a stump that sprouts. Others have roots that worry homeowners near pipes and foundations.
These guides cover dealing with suckers and seedlings, root concerns and removing a tree or stump you no longer want.
Guides by Nick Robinson

Root guide
How far oak roots spread, and what they can and cannot damage.
Root guide
Willow roots, sewer lines and safe planting distances.
Root guide
Birch roots are shallow and wide, but how much of a threat are they to foundations and pipes?
How-to
Dealing with cottonwood suckers without encouraging more.