This is a 12 week old auto. Had shit lights at first so she is still growing, but got new HLG’s about 2 weeks ago. It’s over 18” so it’s not light burn. Doing light feeding last time. Running straight water now. TDS is at 380. Don’t wanna feed much more what do you all think?
)Also, is this plant ready to FIM?
Is so cut where? Here ?
Needs calmag, the HGL lights cause it.
How much? Using fox farm
How’d you know HLG?
High intensity LEDs will cause plants to use cal mag faster. If you were using cheaper LEDs similar to most LEDs sold on Amazon the upgraded lights will cause deficiencies .I had same issue when I upgraded.
I started using recommended dosage and it got things going in the right direction.
Just manly the more intense lights, and everyone here gets the HLG upgrades from their bruples. I let the plant grow some before a FIM just so it wont stunt it to much. The FIM wont stunt it as much as taking away the light catching ability for the leaf’s your cutting off…
Sweet. I’ll follow their recommendation
I love my HLG. Gonna for sure buy another one
Phosphorus deficiency . Just went through this with my last grow. The leaves most exposed to the lights will start to get spotty and crispy. Stems with go red/purple and your leaves will be a very dark green whats Your ppm? . What’s your ph?
Same thing happened to me when I switched to hlg 550 
I’m with @Watt-Sun but need cal mag too. I would bump up the P numbers by 10% or so which will help to bulk up your flower. Gringo Rasta about 5 ml per gallon.
Another thing to look at is the white spots I’m seeing. Use a jewelers loop 60x etc and look closely at the leaves…top and bottom as well as on the branches for any bugs.
May be something else but you may want to check.
My TDS PPM was 380 2 days ago. This plant is a 12 week auto going into the 13th week. Way behind due to shit lights at first. So ppm is around where in needs to be. Needs to be higher according to chart. Ph is 6.1
No bugs that I can see with my loupe 
Exactly what I used was 5ml and a gallon. If it don’t get better I’ll give her more
Every other feeding or watering. No more than the 5 ml/gallon as cal mag raises the TDS like crazy.
