Harvest Festival - Late Season Grow

I have 3 photo period Harvest festival ( Outdoor Skunk x Amstel Gold ) plants to take the place of 3 autos that are near to finish. I'm using an organic eco thrive supersoil and will be also givng plants an organic diluted feed collected from my womeries. Not sure how much of a veg stage these plants will get before flowering kicks in as they are an earlier outdoor variety so may trigger in a few weeks. Not going to to much in the way of training other then maybe defoliate a little later on and train any branches outwards. Hoping by picking an outdoor variety i'll have better chance of avoiding possible mould later in season.