critterologist said: Was the sand to keep your grow bags upright? I've seen people put grow bags into plastic storage bins to give them more structure (several bags per bin).
No. I used the sand because it was free. Along while I was first potting up the plants I didn't have enough store-bought dirt to work with. Plus, I was trying to save some money. Store bought soil is getting too expensive. Pretty much the rest of the pots, however, are composted of store-bought soil, leaf mulch and ancient chicken litter. Our garden plants just do not like the sand and I don't know why. Plants transplanted into it turn yellow or stunt within a few days of being put into it, so I have to make sure plenty of fertilize is amended into the hole I plant the plant into.