First time I ever remember anything being Labeled as a Kush, was in 1991.
A buddy of mine was a Eagle Scout Master, and went to a convention, in Louisville, Ky.
He met another Eagle Scout Master there, though he was a bit younger than my buddy. Buddy was about 40, and this guy was maybe 25. But they got onto the subject of weed, andmy buddy told him he grows some, and the guy said he does too, and wanted to give him some seeds, before he went back home. This guy also lived in Louisville.
So long story short. He gave my buddy 2 different strains. 15 seeds each.
One was a Nevils Hashplant x Haze x Skunk 1 x Kush. It was simply labeled Kush.
The other strain was NL5 x Haze x Nevils Hashplant x Sk1. He gave me these seeds, and I gave them to a buddy for a seed increase, and it was the best stuff Id seen in 20 years. Remember, this was 1991, and was, and still is, the best stuff Ive ever seen for indoor weed.
And the strain my buddy kept, wasnt far behind. Mine was more Sativa Dominant in structure, and Buzz. It was early Inside. 7 weeks tops, but outside, it wasnt done until 1st week of November. It would make some people extremely sick, and paranoid. One girl still hates me to this day, because she thinks I put PCP in it. She laid in front of the toilet for 5 hours, dry heaving.
His was more Indica Dominant, as it grew into a small- medium size ush. BOTH strains, were Narrow Leaf.
I lost mine to the feds after growing it about 6-7 years, and he lost his, to bad outcrossing's, and not keeping it pure.
But first time I ever saw, or remember Kush labeled as such, was 1991.