I spent 9 years there and it is part of my observations. Worked on harvesters some years. We were sent to a field covered with dead weeds because of drought. the instruction was to dig one pass and if the potatoes were small or sparce to go on to another farm. Turns out that field had received adequate rain early in the year but not late in the summer. What came to the sorting table, except for an occasional weed or rock, was an abundance of large clean potatoes. So, yes, three months of not too wet, not too dry, not too hot or cold and you get a potato harvest with almost any soil. The secret in Northern Maine is to cover the row with a new layer of loose dirt at the right time so there is a perfect layer for the tubers to form. Best results are when the loose layer dose not get wet enough to compact or hold wet conditions around the forming tubers. This is most important when the loose layer is organic material to have smooth skinned potatoes. Observation of one of those farmers: When maple leave or clover along the edge of the field were picked up and deposited on the row it produced scabby skins.
steve bossie wrote:in northern Maine. potatoes are the most grown crop. the high schools close for 2 weeks for potato harvest. we have heavy clay, rocky soil with poor drainage and they grow just fine. they grow here when little else will.
Dave Bross wrote:For sweet potatoes that stay right under the plant Bush Porto Rico is supposed to be the best so far.
I haven't tried them yet. They're also supposedly do-able in a large container.
O Henry makes that claim but they didn't work that way for me. Close, but some rogues. Tasty though, closest one I've tried to Irish potatoes but sweeter.