Sativa vs indica is meaningless but if one wants to sleep THC+CBN is the way to go. And usually these products are labeled as "indica" on the packaging. Sometimes melatonin is added as well. I shy away from that but it also works quite well.
Amber trichomes indicate the THC degrading into CBN.
If you harvest when the trichomes are milky or clear but not amber you'll have higher THC vs CBN.
But this earlier harvest comes at the expense of yield as you sacrifice time that would be spent with the buds increasing in size as they become ever more sexually frustrated.
