How Can I Kill A Mature Cardoon

Question

I need to remove a mature Cardoon. I have dug out a lot of root, but it is fibrous, and DEEP. I would like to replant the area, and not sure which, or if any, rootkillers should be used.

Answer 1

You may need a nonselective herbicide containing glyphosate to kill the remaining roots. Be sure to read and follow all label instructions.

https://www.gardeningknowhow.com/edible/herbs/cardoon/growing-cardoon-plants.htm
https://www.gardeningknowhow.com/plant-problems/weeds/using-herbicide-in-gardens.htm