quote:

Originally posted by architect:
You obviously don't have the Japanese Stilt Grass in your neck of the woods (yet).

That shit showed up about 4-5 years ago here in my neck of NoVA. The stuff that kills it is overly expensive - tried it once with marginal results. We finally got rid of it simply by physically pulling it out of the ground every time we saw it. Gotta do it before it seeds in July-August. It doesn't help that the neighbors do nothing about it and have lawns full of that frickin' shit. I'd love to know how that shit got here.

Another is mint. My Mom planted some when I was a kid to make jelly. Pulled it out in the fall. I don't think she or my Dad ever got rid of it.

When I lived in Washington it was Blackberry, hands down...
Around here it's Bush Honeysuckle - it releases a herbicide as it spreads to kill all other plants, has billions of seeds, and grows 10 feet in a few months.

Kudzu
English Ivy
Poison Ivy
Bamboo

quote:

Originally posted by RogueJSK:
Crabgrass. If you don't apply pre-emergent to prevent it, it'll totally take over your yard, and nothing will touch it.

Nothing in the big box store will touch it. Have you tried tenacity (i.e. formerly commercial weed killer now available to consumers at garden centers) with a surfactant?

I forgot about the grape vine, yikes.

HRK we used to pay a man to burn the palmettos when we were clearing to plant trees on our property. Like you said a simple brush fire is nothing but a warm up for them. You have to up root then burn them, like piling them up and dousing them in diesel, and adding more to burn them down.

Yucca may the worst in Colorado's eastern plains. It's really bad in some fields & pastures. Fortunately it is easily killed with Remedy herbicide (triclopyr). Unfortunately the plant propagates like wildfire from both seeds and roots.

On the weed side, mullein and thistle are serious problems on our plains areas. The plants are easy to kill with herbicide, however mature plants produce gazillions of seeds that can remain viable for decades.

Buckthorn.

Mulberry trees are tough to kill, nasty, dirty SOBs!Trees of Heaven right there also!

Kudzu in the south. Invades everything. Goes dormant in winter then returns in spring with vengeance and grows super fast. Round up and Ground clear products wilt it but never kill it. I've dug up the roots, pass the root balls, and drowned areas with Eound Up and it'll still grow back. My neighbor and I fight it every year. It's relentless.

Mulberry tree, neighbor behind me has one and try as we might we can't kill that thing.

quote:

posted by TMats on page 1: Going back to my years in the Arizona desert, i’d say creosote.

A "colony" of creosote bush in the Mojave Desert is estimated to be over 11,000 years old. https://en.wikipedia.org/wiki/King_Clone

Kudzu, English Ivy, Japanese Stilt Grass, Virginia Creeper....

Georgia Drapes also known as Kudzu.

Saw palmetto, crab grass, potato vines, yaupon

The Paradise Tree. Also known as the Tree of Heaven. The damn things don’t die, resist poisons, and produce so many seeds.

Worthless trees. Weak wood with a foam like core. You can’t burn it because of the stench. It smells like piss on a campfire.

https://azinvasiveplants.arizo...ve-plant/tree-heaven

Mesquite, grass burs, grapevine, greenbriar, bull nettle... take your pick. It's an expensive and time consuming effort year round to keep these and other invasive plants out of my Coastal Bermuda hay fields. I've got all five plus a few others in the new field I bought, and after 4 years of trying to make a decent hay field out of it I'm going to give up and run cattle on it.

The world will end draped in kudzu.

Dandelions.

Blackberries here. They grow everywhere and are a nuisance.