Light, fluffy flowers. What makes dense, heavy flowers?

[shovel1966]

I harvested a couple autos from my first indoor living organic soil LED grow attempt. When properly dried over the course of a week or so, I found the buds to be light, fluffy, and full of air. It was good smoke, but the dry weight was lighter than I had anticipated.
Aside from genetics, what are the major contributors to cultivating dense, heavy flowers? Environmental conditions? Nutrients?

 

[Mañ'O'Green]

I harvested a couple autos from my first indoor living organic soil LED grow attempt. When properly dried over the course of a week or so, I found the buds to be light, fluffy, and full of air. It was good smoke, but the dry weight was lighter than I had anticipated.
Aside from genetics, what are the major contributors to cultivating dense, heavy flowers? Environmental conditions? Nutrients?

@shovel1966 IMPO In order of importance, genetics, DLI 40+ in the correct spectrum, nutrients, environment and the grower's skill level.

Looser buds are less susceptible to bud rot and that is a good thing. So be careful what you wish for.

 

[nizmoKush]

I harvested about 9oz 3 different plants. All 3 where dense. All I did was add worms to some used soil I had and just fed the worms and watered is all I did. 165w autocobs in a 32x32 space. I scrogged aswell. The best smoke I've had so far.