Nick Williams wrote:I do a bit of a hybrid. Bury potatoes under 6 inches of dirt or so, and then put 6-10 inches of straw on top (they eventually grow all the way through). Very consistent temperature and moisture levels and good yields, no hilling or piling mulch throughout the year...
EDITED TO ADD: Important around here, such depth of dirt and mulch really helps shelter the sprouting potatoes from late frosts.
"Very consistent temperature and moisture levels and good yields, no hilling or piling mulch throughout the year..."
That is an advantage that deserves to be highlighted: Bare soil invites weeds and the sun bakes the soil, making more irrigation necessary. Most plants like a more even amount of moisture. Here, it is quite sandy, so laying the potatoes in a very shallow trench [like 2"] and hilling later [twice, as the plants grow bigger]]seems to work best for me. Since the soil is so sandy, hilling really doesn't take much effort, and digging deep to harvest is not a problem either. I tried to add straw to this. Well, the straw stayed down in between the rows of potatoes... and I got voles eating my potatoes, a problem I have not had with hilling alone. My soil PH is 6.5, which is just about ideal for potatoes. Our area [the Central Sands of Wisconsin] is very big on growing potatoes! In fact 2 years ago, we had the record for the longest baker. [12" if memory serves - but that was chemical farming. Booh!]
Another great point: "such depth of dirt and mulch really helps shelter the sprouting potatoes from late frosts". So true. Especially here: sand does not hold heat, so if we have a cold snap when the potatoes are coming out, you may lose some plants. Early hilling and keeping an eye on the weather solves that.