This is from most reckognised guide in my language sorry for google translate
In the beginning, the resin is completely transparent and clear, but as the plant matures, it acquires a more whitish-yellow or milky color, and eventually it ends up having almost the same color as brownish amber. - Some varieties (eg blueberry) may have a darker blue color in the end, but by and large the resin on most plants goes through this development:
1) clear 2) milky white / yellowish 3) reddish brown
Why is it so important?
Yes, the psychoactive properties of the plant are quite different, depending on how long the resin has been allowed to mature. The same plant can thus be experienced as crucial to smoking differently, all depending on whether it was harvested at the right time or not.
In general, it can be said that the longer the resin is allowed to mature, the more potent the finished product becomes. And the greater the content of the various cannabinoids there will be.
You can of course use this to compare with the type of smoke you prefer.
If the plant is harvested while the resin is completely ready, the experience of smoking the plant will usually be quite mild, refreshing and very little physical (ie not so tiring / sedative). This is probably because very little of the THC has degenerated into CBD, CBN and other cannabinoids.
- But do not harvest too early. If you do, the content of THC will be too low at all, and then you will not get much out of it all.
The best thing, in my opinion, is to turn until about 30-50% of the resin has become milky. Here the plant has reached the top level for THC production and there is still a minimal content of the other cannabinoids. The experience of smoking plants harvested at this time will usually be the classic "get tall, happy and a little silly", and at the same time the plant also has maximum psychoactive potential, if you should now be one of those people who just enjoy smoking a little, and then sit and think about things or do something else creative.
However, some people prefer the evil stone-smoker, and if you are one of them, then you have to wait to harvest the plants until the resin starts to turn reddish brown. This is the last stage, so of course you must also be aware that the plant does not get too old at all and begins to wither. I recommend harvesting when 20-30% has turned red, but you can wait longer if you dare. Try it out.
I myself am not so much for this more numbing, tiring type of smoke, so I always harvest myself before it has time to get this far