I started hilling up my potatoes about a week ago. Despite the bin that they are growing in, I started the potatoes in trenches. Once the trenches were filled up, I started filling the bin. I dug up some earth from my woods to put on, bringing it over in five gallon buckets. I calculated that it would take about a cubic yard of soil to fill the bin to the top, though I don't have to get all the way up if I get tired of hauling dirt. I calculated that it would take about 40 full buckets to fill up my bin all the way.
I figured that would be two buckets a day for 20 days, which wouldn't be a lot of work any one day. The potatoes had other ideas though. They are growing faster than 2 buckets of dirt a day. Today I broke down and just took a couple of wheelbarrrow filled with compost over to the bin and carefully put that in. Potatoes love to grow in compost, but the massive amounts of organic matter can cause scab. Scab doesn't like acid conditions (which is why this is the only section of the garden that didn't get limed this year), but then potatoes don't like growing in acid conditions either. I could make the soil more acidic, but I think I won't. What I'm going to try to do is keep the potatoes watered well. Supposedly well watered potatoes don't get scab as much as the drier potatoes since the bacteria in the soil can out compete the scab fungus.
I didn't plant the potatoes very closely. I have 10 seed potatoes for 16 sqft. That is a lot more space than Jeavons says to give them. I'm really hoping for large potoates since they are easier to peel. Sometimes ease of use is better than a bigger harvest.