Im going into growing soon and almost everything ive read/seen talks about a handheld microscope being a great investment. I managed to pick one up for £3 the other week! When you look through the microscope you will see that the trices are in one of 4 stages.
The first is when the trices are clear, this is not recommended for harvest.

The second is when the trices are cloudy and if harvest here produces a very uplifting "head" high.

The third is when the trices start to turn amber and if harvest here the high would be a baked high or a "body" couch lock high.

If harvest when all the trices are amber and the resin heads have begun to lurch to the side then THC production has gone into regression.

Its all about timing and personal preference when it comes to harvesting your bud.

Hope this helps

GanjHound :bigsmoke: