Garden Box

Question

So with this concept, how do you maintain between seasons in the north? Do you need a tiller small enough to go into the box?

Answer 1

No, you do not need to till it. Depending on the size, you will either replace the soil completely every year or, for larger ones, simply add some fertilizer. You should not be using a soil medium that compacts in the boxes, so it does not need tilling.