How Can I Safely Get Rid Of And Keep Crabgrass Out Of My Irises Along My Fence Row?

Question

Irises bloom every year but need to be separated. Crabgrass is so thick it is hard to do so.

Answer 1

This can be difficult to do, but a selective crabgrass herbicide will do the trick. Just make sure to treat the current grass, and use a pre-emergent for the seeds before they pop next season.

https://www.gardeningknowhow.com/plant-problems/weeds/crabgrass-control.htm

If you want to do this without chemicals, then I would suggest using boiling water to kill the whole area and start over! You may have to do this a few times over the course of a week, but it will kill off all plants and pests in the soil.

https://www.gardeningknowhow.com/plant-problems/weeds/boiling-water-and-plants.htm