Plant burnning out

[budinca]

Please help me here.. i can't figure it out what's the problem
water PH 6.00-6.500
watered every 3-4 days
light 12/12
45days old
pot size 500grams
autoflower short rider

 

[HerbalBeast]

Looks like Zinc or N deficiency to me mate... Not sure, any other opinions?

 

[*BUDS]

Please help me here.. i can't figure it out what's the problem
water PH 6.00-6.500
watered every 3-4 days
light 12/12
45days old
pot size 500grams
autoflower short rider

overfertilized. flush pots, water only for 7 days then bring back nutes 20% less of what u were using.
may want to re-pot after that as im sure they're root bound.