bleach

Salt

Can't you just rip it from it's roots and toss it? how about fire then?

The organic method usually works, jerk that plant out of the ground!

Try to pull it out from the root, then "stab" the dirt to break it up a bit. Soak it with lighter fluid and burn it up....

theres a commercial called roundup available widely (Wal- Mart, Home Depot) It comes pre mixed and only works on healthy plants... it stops the plant from processing chlorophyll and it dies never to return Just mist the leaves as directed.

Vinegar

Salt and water it well in.

So its salt+water+vinegar+bleach huh? Excelent!!

Why kill it? It wants to live too. What is the plant doing, why you want to kill it?

a garden spade or fork.

White vintager. It's cheap and very effective.

I agree with GeorgieGirl, why do you want to kill a plant? (If you don't mind my asking. See, I'm an avid gardner and constantly "rescue plants" mostly from co-workers who abuse them. When I started in the office I work in, there were no plants, there are now about ten.) Unless, maybe you are allergic to the plant. In that case, I agree with the others who advise salt.

Bleach will kill a plant in less than 24 hours. A long time ago, in a past life, I worked as the CFO of a startup software company. There were five people who reported to me, one being the administrative assistant to the president of the company. For some reason, this woman had it in for me. She would frequently make derogatory comments to me in front of the president. As I had a great relationship with the president, I usually just laughed them off. One time, she really pissed me off with a comment. I used to keep a number of my own plants throughout the office. So I would go around an water them all twice weekly. I also got into the habit of watering other plants that employees had brought into the office, including a flowering plant that this AA kept on her desk. One Friday afternoon, as I was making my rounds watering the plants, the president came out of his office as I was watering this woman's plant. She turned to the president and said "I wish I had time to water plants in the office like Peter does." (This was at the end of a week where I had already put in over 60 hours, while the AA might stretch her hours to 36 if she made it until 5:00pm.) I waited until she left, and went to the cleaning closet. I grabbed a gallon of bleach, and watered the plant with about 1/2 cupful of straight bleach. When I came in to the office the following afternoon, it was dead as a doornail. By the time she was back to work on Monday, the poor thing had shriveled up into a blackened mess of slimy leaves on a dried out stem. The funniest part about it all, was that she always blamed me thereafter for "shirking my duties" and not watering her plant - thereby causing it to die.

My mum's tea.

You could easily apply some physical strength and elbow grease. It's free. Rip it up and tear it in half. That should do the trick.

Two hands around the main stem, then apply force.