What is the most effective way to kill Iris roots?

I am trying to get rid of some Iris' that were growing along side of my house and taking over my driveway. I chopped them all down with the weedeater last night because they were just too out of hand. Now, I am trying to figure out the best way to rid of the roots, so that I dont have to chop them down every year. I have already used Roundup. Didnt even phase them. It is on the side of the house where the driveway is, so there isnt enough room for me to dig them up.

What is the most effective way to kill Iris roots?
If you used Roundup, you need to wait for it to sink in and the plants to start dying. By cutting off the leaves, the Roundup can't make it to the base of the plant.





If you used roundup and saw zero leaf die-off, check the expiration date of your RoundUp. Also make sure you mixed it to the right concentration. You need to use *alot* of RoundUp to kill a plant, so spray the heck out of it next time. Wait for dry weather so that rain won't wash the chemical off.





If it were me, I would've offered the plants free to neighbors. Lots of people love Iris, and they would've done the hard work of carefully digging up the bulbs for you. Right now your only option is to use a small hand shovel to dig out the bulbs.
Reply:Round Up will kill them if used properly. It's systemic, meaning it needs to be sprayed on the leaves so that they can carry the chemical down to the root of the plant. Also make sure your are diluting it to the proper strength. I like the kind you mix yourself rather than the premixed. And wait at least a week and a half after spraying before you cut them down. If you don't get a good kill the first time you may need to reapply.
Reply:There is a product called ground clear that you can buy at the depot. Will kill anything. Though I agree to ask neoghbors if they want to come over and dig them up. If they grow there you must be able to get them out.
Reply:If you do not want to dig them up - which is the best thing to do - you can cover the rhisomes with 4 inches of dirt. Iris will not grow and boom if their rhisomes are not on top of the ground.


They are very easy to dig because they sit on top of the ground and the roots are delicate and shallow. You should have no trouble at all pulling them up with a hoe or round shovel.
Reply:If they keep coming back put an ad on Craigslist.com


Free Dig your own Iris!


Someone wants them. My brother-in-law got rid of a pile of broken concrete this way, some one loaded it up and took it away.
Reply:Coffee, make some coffee, and go pour it on the weeds, take care of those things fast