We harvested our first crop of purple potatoes this week. Our seed was unused store bought potatoes that had sprouted, so I don't know what kind they are. They were a small potato and appear to be a mid-late potato from planting to the tops dying. We planted them above ground in barn bedding and uneaten hay. I am fairly happy with the results, getting 8-10 potatoes per seed planted.
We planted whole potatoes and dipped in sulfur to avoid rotting in wet weather. In hindsight, I would have liked to have done some with dipping and some without for comparison.






