I have found in the long run, I record a date from a green sprout popping up... then I don’t really care since my end goal has become 25% amber trichs except for sativas. With that start date, i can determine my veg time and that’s about all I find it’s useful for. Don’t believe that a seed house can guarantee a maturity date with any real accuracy. Variables that develop during a growing cycle become much more a a determining factor and as we all know...crazy stuff happens with any plant. Just look at the thread on HELP....tons of questions on problems from roots to lights