White Widow problem

[A3you]

Hi Guys! I sorry in advance for my English...I’m Italian
I’m running a grow with 4 plants in a 5 gallons pots under a spider farmer sf4000...2 Og Kush witch are simply amazing and 2 White Widows witch form the beginning, even if the growth is always been vigorous, showed some leafs green life colour With some brown spots all around the plant..
Nowadays at the third week of flowering the problem is running so quickly and day by day they are becoming yellow and burn all the leaf! (Even if the bud develops is particularly good on them)
I use canna fert in soil and i give always 2/3 of what they suggest alternating with clean water at ph 6.5!
What do you think is going on here?
and why the 2 OG are perfect even if they are drinking the same soup?
here some photos of the girls!

 

[Bill284]

Hi Guys! I sorry in advance for my English...I’m Italian
I’m running a grow with 4 plants in a 5 gallons pots under a spider farmer sf4000...2 Og Kush witch are simply amazing and 2 White Widows witch form the beginning, even if the growth is always been vigorous, showed some leafs green life colour With some brown spots all around the plant..
Nowadays at the third week of flowering the problem is running so quickly and day by day they are becoming yellow and burn all the leaf! (Even if the bud develops is particularly good on them)
I use canna fert in soil and i give always 2/3 of what they suggest alternating with clean water at ph 6.5!
What do you think is going on here?
and why the 2 OG are perfect even if they are drinking the same soup?
here some photos of the girls!

Omg your poor. You def have a lockout or deficiency for some reason.
How long has she been in that pot.You can get salts build up around roots preventing proper uptake. I would start with a flush of that pot 3x volume with ph water.Then a feeding with a calmag in neuts. See how she responds.

 

[Emilya Green]

Greetings @A3you and welcome to the forum!

White Widow is know as a moderately difficult plant to grow, because it is traditionally a very hungry plant. She can basically take all the nutes you can throw at her, and she will use them to build a massive amount of trichomes. She is the one reacting to your 2/3 nutes because she wants more.

Try giving all of your plants a full load of the nutes and see what happens. Your plants are not being burned by too much fertilizer, you are experiencing a deficiency on this one plant. If you were giving too many nutes, all of your plants would be affected, and the same if it were caused by a salt buildup.

Putting all the clues together tells me that all you have is a hungry White Widow. Feed her more.