Autoflowering soil?

I would still dose them with a heavy nitrogen and humic acid 2 weeks in. An auto is very dependent on that first growth spurt ... if you want a heavy harvest. Every inch in height will return the care.
 
Yes....Don't over feed them, but give them an N boost. You don't have much to work with time wise, but enough time for the nitrogen to make a difference.

If you want to, you could just fert half, and then see the difference.
 
Tiger bloom is chemically derived.... which means it's stronger. Organics take time to really affect a plant compared with chem.

Growing autos ... I'd stick with Tiger Bloom over Big Bloom.
 
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