Hi Weedwhacker, love your handle, lol. so you're a Upper! Maybe if you started the plants in a hot bed, you could get an early start, then remove the frame and let them grow the rest of the season. The fresh sweet potatoes are soooo good. It might be worth the effort. I live just about 8 miles North of the Illinois border. It used to be just inside the zone 5 area, but now I'm in zone 5b with the new zone map. Thanks for the info on starting slips. From what I learned watching the u tube video's I'm thinking I should start them about Mid March. I'm going to order some too, just in case, so I don't end up with none. I can always give away the extras.