my friend has as close to a perfect spot as i've ever seen, a small bowl valley with a strip of trees running north and south down the middle, with a stream running through the trees. he plants along the tree line, close to the stream. the plants get strong morning and evening sun, while being shaded for the hottest part of the day, and get plenty of water. he grows fucking enormous plants, and that is where i have occasionally seen 15 fingered leaves, the size of dinner plates. i'll try to remember to take some pictures when i visit him later on this summer, even if i can't find a 15, 13s and 11s over a foot long are common