if you filled them half to 2/3's with mix, then planted your seed potatoes. As the potatoes grow you continue to add more mix until the container is full. (Beach_bum) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ I agree with Beach_bum. Potato needs HILLing. So in the pot you keep adding soil as it grows. This will provide room for the tubers. ALSO, the plant draws the nutrients from the lower part of the soil. What you fill/hill with, does need to be fertile. A mixture of peat and pine fine will do(like 5-1-1). So here is what I would do: --- Fill about 10"(rich soil): REMEMBER that the roots will grow ONLY in this soil, not above it. --- Place the seed(s) on it. --- Cover with about 4" of soil Do hilling/filling as the plant grows.

Wow! I looked up those bags, and what a great idea! I have 120 cuttings of which I'll be lucky if 30 of them grow into plants, but I was worried about the expense of containers. Thanks for the mention of those grow bags! I am a huge believer in air pruning, but I'm sure I can vent those bags with a hammer and a nail punched gazillions of times! Also, that was a great idea about the bags of topsoil! Sorry I don't grow potatoes, so can't help you there. I just appreciate your mention of that gardening site and those bags! Suzi

I made my own using the shade cloth....sewed up with wire, lol. I put a plastic wire around it to keep it standing at first. I rolled down the top like you would a sock. I put in some gardening dirt, put the 3-4 potato eyes down and covered with a bit of dirt, put in 3 more and then more dirt (maybe 3 inches) As they are growing I roll up the bag and add more dirt to cover stems up to top leaves. I have done that many times....I am probably a good 8 inches from top of bag and then I will stop. When they flower they are growing fruit all up and down the vines. When the vines die, I can harvest them. I made one bag that way, I used another 2 for my tomatos which are doing well. I planted more potatos the same way in a dog food bag. They are growing just as well. I just added a couple of small slits about 1 inch up from bottom. It drains just fine. I planted two nursery black pots. One is doing well and the other rotted. I think I will not plant the eyes from now on. I will plant the taters on end and the eyes will all sprout without the rot problem. I planted 2 raised beds I made with stacked dresser drawers and they are doing well. Will be interesting to see which taters do the best.

Don't use 100% grass clippings. If they get too wet, you get a slimy mess.