What can I plant on a pretty sharp slope to stop erosion?

There are several varieties of ajuga or bugleweed that work well for me here in Alabama. It is in the mint family but doesn’t go as crazy as mint. If you put a border around it you can contain it better. I have grown it in sunny and shady spot. Look it up and see what you think. Also, I like sedums bec they are pretty and not to hard to grow. Both of the plants are ground covers. If you’re looking for something larger than that, l would consider a juniper. Hope this is a little helpful.

Monkey grass grows well in Texas.

I live in Texas too, and we have crab grass that we can't kill and can't get rid of unless we dig it up with roots and all. Makes a good ground cover, though, and would be perfect on a slope.

https://americanexcelsior.com/erosion-control-ground-cover-plants/

Phlox loves sun and comes back every year, multiplies in size yearly too...gorgeous colors to choose from...

Phlox and Jupiter is also my choice .I have plod on my slope now .hard to keep weeds out .does multiple and very pretty .comes back every year .

Check on line for information as to what you require and you will note the plants that will thrive in your planting Zone. Anything you plant will require a lot of water until it is fully established. You could maybe rig up a soaker hose for that area starting at the top of the slope and running it across.

Asian ivy would be my choice. I live in Tyler,Tx. Also I have fig ivy on a retaining wall which would also work on a slope

Ivy

Beverage holder to stick 8n dirt or sand