If you live in a warm to temperate region, plant your potatoes in late winter. In a truly hot climate, plant potatoes in the fall to grow over the winter. I'd definately give them a try. If they don't grow then at least you'll know not to try sowing them in winter again.
Gentian violet belongs to the group of medicines called antifungals. Topical gentian violet is used to treat some types of fungus infections inside the mouth (thrush) and of the skin. Gentian violet is available without a prescription. This product is available in the following dosage forms: Solution.
The purple spray has gentian violet. Personally I much prefer the blue spray for wounds as I believe I was told by a vet years ago that it has more potency, however gentian is good for more sensitive areas. http://www.horseandhound.co.uk/forums/images/graemlins/smile.gif.