Possibly. Just remember that the creosote on them isn't a good thing when growing edibles.

Should be OK but I agree with Tugbrethil about the creosote maybe you could line the edge with plastic or weedgard to create a barrier between the plants and poles

I don't know about weedgard, if it's a fabric, but plastic should work.

Hi Tugbrethil
Weedgard is the black membrane fabric that you will know about its just a brand name.

Since it is a fabric, it will allow some of the creosote byproducts to leach through to the roots. Better to use actual plastic sheet, 6 mil--I don't know the metric equivalent--or thicker.