Raised beds give an outdoor auto unrestricted roots and a stable moisture level, and my bed grown plants routinely finish half again the size of the same strain in a fifteen litre pot. The trade off is that you cannot move them under cover when a storm rolls in or shift them to chase the sun. Bed depth and soil mix suggestions for autos are laid out on https://turboautoflowerseeds.com (https://turboautoflowerseeds.com) and forty centimetres deep turned out to be plenty. Pots still win for a balcony or anywhere discretion matters.