Early flowering auto flower. Please help

[Budah]

Hello hive mind! I hope you can help!
2 plants, Northern Lights autoflower (started lst see photo) and F1 Hyperion Autoflower. Both potted in fabric 20l pots with westland young plant mix
NL has started flowering prematurely and have nonidea why! Recent hot spells, but notnleft to dry out, fed with biobiz grow, in a greenhouse. Not doing things scientifically and have never grown before but I assumed autoflowers where on a genetic timer of sorts... really didn't expect to see flowering after 7 weeks.
F1 is a couple of weeks behind the NL but also showing signs of early flowering.
greenhouse day time temps kept between 30 and 20. Night times temps down to typical zone 9 no extra heating provided.

see

 

[Phyto]

Autos begin to flower anytime from about 3 weeks to 7 weeks, usually around 4-5 weeks. Hot/cold and hours of sunlight don't really have much of an effect, other than you'll get more growth with extended sunight hours. There's not a lot you can do to extend or delay flowering. They flower when they flower. Photos are much more forgiving of mistakes/isues because you control when they flower.

 

[orggrwr]

Also they can easily double in size after flowering starts, sometimes more.