I like Fall the best. Sadly I haven't leveled up my sweet potatoes much. I'm still on level 1 & 2 because I try to grow the giant veggies for each level before moving on to a new level.
doesn't really matter for me and even if it did i probably still wouldn't do it cause i am kinda lazy too...i dont even think i know how do level them up anyways...dont you just plant some crops then put more of the same kind ont op of it???