Blue dream clone advice?

[Bomber420]

I'm picking up 30 blue dream clones their almost teens they measure 8" tall in 2 gal pots but with a thick stem and bushy not your normal clone u buy from dispensary ..

how long do I need to veg indoor to get them to finish at 3.5-4' tall outdoor greenhouse ?

Thanks on any advice

 

[JJ Bones]

Veg until they're about 20-24" tall then flower.

 

[Bomber420]

Veg until they're about 20-24" tall then flower.

Would they still finish flower outdoor May 15 ?