I tell guys all the time....it isn't magic!! Hit a few key important pieces of the puzzle, point the plants in the right direction, and let them fly!!
Expansive root base through ample easily digested nutrients, in a loose easily penetrated proper ph medium with good drainage.
Open canopy training to maximize solar asborbtion
Every year i toss out plants just like these! Nothing complex to make it happen regardless of strain! Horseshit and love, along with some well planned work and training!