Turn old newspaper into seedling pots. They can be planted directly into the ground as the paper will eventually biodegrade. You can form them by wrapping the paper around a jam jar or similar, or there are 'devices' that can be bought to make the pots.
5 Gal bucket wrapped in burlap held in place by twine - interesting planter idea Thin king this could be really cute in oil cloth as well. Think I found a solution for the bazillion 6 gallon buckets I have ion my deck trying to grow tomatoes.