I just switch when I see the first signs of flowering, what might be called pre-flowers in regular photo-period strains, but in autos, they will steadily continue to show more and more the signs of full flowering, steadily, there after.
Also, I kind of use a steady, and more “flowering” ratio leaning type NPK, the entire grow anyway, à la the “Lucas” formula.
@MacGyverStoner, thanks much. That is exactly the info I was searching for, and will take the method advice into account.
I’m about to start flowering on my three Strawberry Kush, as they are growing at a rate that is amazing. If the other ILGM strains perform like those, I’m sold
I’m thinking I would order and try some White Widow autos and see how they turn out.