Growing Potatoes in a Garbage Bag Update

It's been 2 months since I planted my potatoes in a garbage bag, and they've been growing like crazy!

I've added dirt to the bag three different times now, carefully and gently covering the lower branches of the potato plant. When the stems and leaves are buried (supposedly) they turn into roots and grow some more potatoes.

I'm restraining myself from digging and peeking to find out what is going on in there... I really hope that this works for me!