My Plant Nemesis

By far the worst plant I have to deal with in my yard is the Air Potato (Dioscorea bulbifera). It's a constant battle that I always seem to end up losing. Each spring I find myself crouching on the ground on hands and knees trying to pull up sprouts and dig out as many "lovely" tubers as I can, sealing them in a bin bag and trying desperately to keep them from dropping out and spreading to other parts of the yard. In the middle of the summer heat I'm wrenching the vines of fences and unwinding them from plants that I actually want to grow. In the fall I try to remove as many of those knobby little orbs from the vines before I remove any remaining vines lest they have a chance to drop to the ground and reseed.  And yet despite my best efforts, they still manage to come back...every year...taking over and driving me bonkers in the process.    They're worse than the bamboo whose stalks I cut down with a reciprocating saw and whose woody rhizomes I have to dig up and pull, more invasive than the english ivy the creeps up the walls of my house and the trunks of any trees or shrubs it can find, more sinister than the winter creeper that covers the ground in a blanket of tough vines with waxy leaves as it makes its way to find a tree trunks to smother to death.   ZOMG 

What's your worst plant nemesis? 

Chickweed - it seeds profusely as soon as my back's turned, even with a sharp hoe I can't slice gratifyingly through the stems so the plants get lifted out of the ground (but not far enough to kill them), yet perversely if I try to pull them out by hand they invariably snap off leaving the roots intact to grow back another day. 

I'd love an over abundance of poppies, until I actually had one and then I'd have wished I'd kept my mouth shut! 
Chickweed, gotta love those plants that seed themselves so readily in the blink of an eye!

Sticky Willy is terrible! My dog gets covered in the stuff during the spring and early summer. Nature's Velcro that stuff!

Comfrey (funnily enuf) great plant but some genius planted it all over my plot = it also acts as a wingman for dock. double trouble.

 

Can't say I've had the pleasure of dealing with dock weed. I've heard of using comfrey to make fertilizer but I've never come across that one either