First grow

Usually the manufacture is close to when harvest is. They say your plant should flower for 56-63 days( 8-9 weeks). You have been in flower for 4 weeks so your about half way there. At this point most of your trichomes should be clear. If you are not zoomed in enough they can look milky from the light reflecting off of them. As you get closer to harvest you want to start to cut back on the nutrients to make sure you don't have any excess in the buds. Be patient, The buds will get a lot bigger then they are now. Happy Growing