Flowering has started on day 29. After using of 7 years old Hesi fertilizers one or two times, leaf tips became a little burnt and yellow. I don't know if it was in cause of long storage of fertilizers or maybe I just didn't have to start with full dosis... Maybe also pH, I don't know, I didn't measure it. However, at this time I thought it was a light or heat stress and I lifted the lamp.