Yellow spots / burned edges / twisted new groth - nute burn or def?

Problem is with one of my dutch passion's feminized white widows, its almost 6 weeks old, a minute before flowering. cant realy tell if its nute burn or def, so I dont know if I should be giving them any nutes next feeding

She's being fed with bio bizz "bio-grow" for the last two weeks (only 2ml per litter so far). I've been giving them nuetral ph water between every fertilizing.

Lights are 600w and temperature is between 75-63F.

It looks more like underfeeding of nutes.
How many ppms is the 2ml to a liter?
I have no ideal how strong that is unless
it's in ppms or ec. How big is yo pot?
This could be the twisting if it's too small~

Dont have any ppm/ec meter so unfortunetly I cant tell.

Regarding the pots, its 2.5 gallons, do you think its enough for flowring?

Thanks for the reply

She needs Mg. Got any Cal Mag or epsom salt? Look up the dosage for a deficiency.

2.5 will be minimum for flowering if it is anything but a small plant. She just will need less water more frequently than a bigger pot, and a more careful balance of nutrients.

Sorry just reread your post...pH neutral being pH of 7? If that is true then it's too high and your not deficient just causing a lockout.

good job dzl-

beginning of mag deficiency. leaves are cupping a bit too?

Thanks everyone.
my ph during fertilizing is always around 6.5, only in between fertilizing I give them nuetral ph water.

yea id say micro nutes deficiency, and go a lil heavier on the N, not much tho.

nice bushyness tho