That aspect shouldn't matter. Those are both very different cannabinoids that don't morph into one another.
Both start out as CBGa and then enzymatic activity turns them into their respective cannabinoid. And genetics will determine your split between the two (and all the other less prominent ones as well).
THC degrades into CBN (not CBD) as the trichomes turn amber, and CBN is known as the sleepy time cannabinoid.
I harvest my plants based on trichome look and, especially on THC plants, I prefer more amber rather than mostly cloudy and clear. But that's totally grower preference. I harvest both my CBD plants and my CBG plants according to that same script but that may be more out of habit than anything else as I haven't had buds tested to see if there's a material difference.
When the trichomes are developing they start out clear which is the structure built but not yet filled. They turn cloudy when filled with the goodies but it's a gradient, some later ones will still be clear while the earlier ones are starting to turn amber.
So, at that point, it becomes a judgment call, and that depends how you like your effects. I prefer indica with more couch lock effects so I harvest mine later than someone who prefers a more "up/energetic" effect.
) however I don't want to let it go and ruin future grows. So she's come down slightly ahead of when she should.
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