I accidentally found some old Purple Majesty Potatoes in our vegetable storage container that had gone to shoot, rather than scrub and peel I planted in an empty container in my garden and left. The normal potato plant leaves grew as normal, without any real effort.
I then run out of potatoes and needed something to eat with a rib eye steak so emptied the container and harvested the Purple Majesty Potatoes. There was a good yield, enough for a few family meals. The Purple Majesty Potatoes tasted good 1st as purple mash then as purple boiled potato salad.