Sunlight dilemma

[ZefsBuds]

I am 1 week in with 4 little sprouts, they are in a greenhouse and right now we are getting around 15 hours light.
If I want to have buds asap does that mean i should cover the greenhouse with something for 12hrs? Any better suggestions and any help is much appreciated.

 

[THC Onlyfans]

Plants still need to be mature enough to flower. I would veg for at least 1 month before flipping.