learned by reading Ed Rosenthal's marijuana grower's guide back in the 90s, they didn't use any LED lights, etc, just MH & HPS, grew a couple in a open room grew A LOT FASTER than the light I'm using now, I bought a couple of those cheap LED lights to see if it was even worth trying to compare but seems to me that it grew faster under HIDs, anyone else having this problem?
That's funny I'm coming across this, was thinking the exact same thing half hour ago. I'm thinking it's the fact that we're able to produce more THC from a plant than back then with today's nutes, focusing it's energy on producing nice thight, sticky, stinky buds instead of growing big, loose not so packed with trichomes flowers.
Today's genetics also play a role in this I think
We used to grow tops that couldn't fit in a 2 liter bottle of coke with
Earth Juice in the 90's.., Shishkaberry, California Orange, Skunk #1, Freezeland (Northern light #5) and the list goes on...where are those?
To answer the OP's question, it all started with Ed Rosenthal's The Closet Cultivator for me
Puff Puff