Ever have one of those mornings?
Sorry, potatoes are NOT bi-annual. I totally mis-remembered that one.
The real reason given for not planting them is they might carry plant disease, which is hard to get out of your garden. Also the yield tends to be less than for seed tatoes. I found lots of good info here:http://188.8.131.52/search?q=cache...&hl=en&ie=UTF8
(Google cache page, the original is not found anymore)
I apologize for posting information that I knew I wasn't sure of. I should have taken the time to check it first.