Should I be worried?

[TheRocket]

Currently flowering four dinafem amnesia haze under a 600watt HPS.
I’m an experienced grower but never experienced this issue.

my plants have just started to bud and look pretty nice but they just aren’t stretching at all! They are growing outwards more like an indica but just don’t seem to achieving any height compared to other Sativas.
I’ve LST’d them during veg pretty well but I still expected some good growth upwards.

there about 2.5ft tall max

So should I be worried about it or not?

thanks

 

[TheRocket]

After reading up, it seems the dinafem Phyno only stays small but bushy. Ive only done royal queen of seeds before and them beauties grow big and tall!