Welcome to the forum. I usually flower at 6-8 weeks. A good rule of thumb is when you flip to flower measure the plant and times it by 3. The plant can double and sometimes triple in height during its flowering stretch.I'm into 5th week of growth just purchased a 600 watt full spectrum from Toleys . What should I be using veg and bloom together or just veg? Also when is the best time to go full bloom??