How do I permanently kill a crepe?

Everything I've read says you need to get rid of the stump. Here's a link with more information:

https://www.wikihow.com/Kill-Crepe-Myrtle

KIll the stump and pull out the suckers immediately when you find them

We had a problem with a neighbor's trumpet vine. Then we installed a block wall between us and there is a concrete footing at least 12" below grade. Their roots no longer invade our yard.

Interesting question. I've been trying to grow a Crepe Myrtle for years! I have a bamboo "situation" going on around my house!

The plant is just trying its best to stay alive. That's why all the suckers are coming up. Just keep cutting them down at ground level; eventually it will give up.

You can use this homemade spray as well, which will help

https://countrylivinginacariboovalley.com/homemade-poison-ivy-and-weed-killer-that-really-works/

I have found that they are very hard to kill. They are one tough plant!

You may have to chop at the suckers, repeatedly, until they die. You cannot use strong herbicides, near your Oleander, but you can carefully "paint" the crepe myrtle suckers with herbicide (using a very thin paint brush), in hopes of slowly killing future growth.

This product will destroy the roots: https://amzn.to/3aSG9Ls

Hope this Helps! Jeremy - https://pahjodesigns.com