Lower buds pistils more mature than main cola

hi there Cookie-Monster, basically pistils dont mature like that, what you're seeing is oxidization , rust, which is why they have that color. This happens because the outer membrane of the pistils get a hole in it and it oxidizes / rusts the inside. This can happen for any number of reasons for example heat, wind, contact, light, humidity, etc... that's why pistils are not a good indicator of maturity. So it's actually normal, but it's not because of maturing. Just keep checking your trichomes regularly , only they can tell you about the maturity. Hope this helps ! 🚀