I was going to grow In a patch in the outdoor enclosure!It's not meant for growing. It can work but it's not the best.
Are you going to grow in containers out of reach? If so you can use potting soil. But it must stay out of reach of the tortoise. If just in the ground I use just the regular old dirt from the ground. So far that is working for me.
If the tortoise will have access to it, I would not use any store bought bagged soil. Arkansas has very fertile soil in most cases, so you should be fine with out it. It okay to add some plain fertilizer too, as long as the tortoise never has direct access to the fertilizer product. Once the product absorbs into the dirt and breaks down after a few waterings and some time, it won't harm your tortoise.I was going to grow In a patch in the outdoor enclosure!