Hi, I'm new here and totally new to growing so I'm grateful for any advice I can get. For my first ever grow I went for autoflowering seeds, Bloody Skunk and Jack 47 XL, grown outdoors using the three stage nutrient pack from Advanced Hydroponics of Holland. I planted in September, which in southern Europe is very late in the season, so the plants did not grow very big before they started flowering. My question is how do I know when to switch the nutrient mix from stage 2 - Flowering - to stage 3 - Micro? Thanks in advance for your help.