This is a very good question and I encountered the same issue with my grow of Sour Bubbly, Heisenberg Special and deep blue C. My trics were getting cloudy but very little amber and I had to take my plants to close to 100 days. Way over the time frame listed by breeder. I grew in 2 gallon, organic soil and two 400 watt lamps( MH and HPS). I checked and checked the trics, noticed no increase in bud size and kept going. They still did not much amber when I harvested at that time frame. Great report from my independent tester though: That was good shit !!! So I am happy with the results, just took 20 or more days longer than Mephisto site stated for those strains.