[jfengel]

Dandelions are really, really hard to eradicate by pulling. The roots grow very deep, and if you don't get them completely, the plant can re-grow from what's left.

Even if you do successfully get it out, it really is going to be more work than painting a weed killer on them.

[SoftTalker]

My dad use to have my brother and I work for hours during the summer pulling dandelions in the lawn (to be fair he was out there with us doing it himself also). We each had a knife with about a 4" long blade, we would cut the root as deep as we could and pull the top out. Never really seemed to reduce the number we had.