I did the exact same thing with an allium that I bought. To be fair to me at the time, I was told it was A. cernuum, a weak species, but it was mislabeled. Whatever it is I have spreads by seeds, offshoots, and little bulbils that form on the seed head. I keep digging it out, spraying with roundup, and try to dry it out by withholding water, but it keeps marching on. At least it is only a problem in the spring. I have several more introduced weeds that are even worse. I'm contemplating getting a hold of some vapam, maybe I can find it next time I go to Reno....

if you continue to cut off the tree growth at ground level it will eventually die. Otherwise, sheet mulch the area. Seeds germinate only if their particular germination conditions are met. Disturbed ground is often a germination condition, and sheet mulching covers bare soil just like a mature forest floor. Pioneer plants (weeds and woody shrubs) indicate other things too. Different species grow for different reasons and knowing exactly what is growing tells you a lot about your soil. Deep tap roots for instance indicate a compacted soil low in organic matter (possibly from tilling and applications of nitrogen). By fixing your soil, the germination conditions for that species will no longer be met and the weed just goes away.

I live in the sonoran desert east of tucson and have five or six types of volunteer vines .I know one is wild mornig glory but like the previous message ,need a pic ..........Rand

nywoodsman's worldview is such because he has never experienced poison ivy like the rest of us! My wife and I are very allergic to p.I. But she is more allergic than I. We went to Disney World one year and they wouldn't let us in to a tour group because they thought she had a highly contagious skin disease (like eczema) on her face!! We had an abundance of it growing in a shrub we wanted to keep. I trimmed the shrub but avoided p.I. like the plague!! But it got so bad growing out of control each year that this year I had to do something. I obtained SYRVET's OB Veterinary Gloves which go all the way up to the shoulders (you can get them on Amazon). I had my wife tape them to my shoulders--however, you have to tape them across the back of the shirt, from top of glove to top of glove because the sweat will cause the tape to come loose and the glove will descend down to near the wrists. Not good!! After I finished working, I had my wife carefully pull the long gloves inside-out and we placed them in a plastic bag for disposal. She had to wash right away but did not get any rash. Once the gloves were off and disposed of, I immediately used Technu on my hands and wrists by rubbing them for several minutes. Then I used a liquid soap on that and washed my hands and wrists off. I followed that with a shower. Don't think that wearing an old pair of pants will protect you completely! Some of the urushiol oil penetrated the cloth and I got a rash on my thigh. I treated it with Technu soap regularly for several days. That did not get rid of the rash but it did lessen the severity of the itch. Some may be interested In knowing that Technu also makes something called "Tecnu Corticool" which is a hydrocortisone that gives you relief from the itch. But you will have to apply it again after awhile. This cream comes in a 1.5 oz tube and can also be gotten on Amazon. Hope this helps