Weed patrol: Trees?

Maple seedlings

For all the griping I do about the evil swallowort, right now all the maple shoots seem almost as bad. Those things pop up everywhere, every year. No matter how many you pull, the next thing you know, the shoots you missed are turning into seedlings, the seedlings you missed are turning into saplings, and even the stumps of the saplings you chopped last year need a haircut. And just when you think you found them all…

Baby pine tree

You find a pine seedling!