I planted a 2 1/2 x 8 feet box of sweet potato slips (rooted from grocery store potatoes) in the Spring & yesterday was harvest day. My grandkids were here & even the teenager got involved when they saw how big they were.
We harvested 47.5 lbs out of that one box & they were HUGE. When I planted them my mom remembered that her dad always said plant them straight down if you want large potatoes, plant at a slant for more longer, slender ones. I planted most of them straight down and here is what I got: