Upcycling plastic feed bags

Does anyone do something with those nice, plastic feed bags, like the ones sunflower seeds or some cat food comes in?  

We were insulating our barn which my husband turned part of into a sunroom.  I immediately filled it with plants.  Freezing weather so had to do a quick insulation job due to all those spaces between the wall boards and cold wind coming in.  We have a small wood stove in there but not enough with all the drafts.  I noticed that the feed bags looked exactly like the material the expensive house wrap was.  So today we gathered up all those bags I saved and ripped them open and he is tacking it up on the walls.  Stops the drafts, and then we’ll do another layer of insulation inside that when we have time.   He already went to town twice to buy insulated foil backed styrofoam boards and they were “out of stock”.  We’re seeing that with a lot of things, so making do with what we’ve got, which we should have been doing all along.   It drops to 7 below zero some years here, but not for long.  What else would work on those walls as another layer of insulation?  I suggested more boards, as he has a sawmill, but that is still a lot of hard work to cut them.  

I also thought about using these as grow bags, maybe cutting off halfway, sewing the half with two open ends, so only one end is open, so two grow bags from each feed bag.  Punch a few holes in the bottom.  It has to work better than those cloth bags which dehydrate instantly.  Tried those, didn’t like them and also expensive, although the ones I had were given to me from a friend who no longer gardens.  I’m going to take the largest of those and cut out for quilted boots, and that will be the outside layer, then a rubber sole.   Never did that before, and it is on my list but not the urgent list.  

Let me hear from everyone.  Ideas?  

Pictures this time.  The leaves that are missing are from goats getting in, when someone left the door ajar.  Can’t let that happen again!