I bought this product, very expensive... just induced flowering a few days ago. I have read some reviews in which people state it works really well as a flower stimulator so use in the first week of flowering, as well as the last two or three weeks of flowering. Then I read other reviews that say only to use it at the end... the actual product instructions say to use at the end of flowering (last three weeks increasing dosage as you go) Also read horror stories of people over-doing it... I currently have my PPM at 600, I usually push my ladies to 1000PPM by mid-late flowering. I don't plan on upping my PPM but should I be especially careful with the Shooting Powder? Have heard the stuff is a miracle nutrient, but I am curious if any of you guys have used it. I usually use a flower stimulator to start flowering, but it seems this product is for the end only. Any opinions?