I think you should be able to bend it over GENTLY. Most of the stretch should be done, now it will put on weight. I never grew PPP but have heard it gets huge. Be careful to only bend it over a little at a time so you don't stress it too much. You can either tie it down or use weights on a string to hold it in the bent over position.
Or, another idea might be to prop up your pot on one side so it is on an angle.
good luck:thumbsup: