Week 5....What the heck is going on here?

[RainFlowerFarms]

So I have a few of my flowering plants doing this......I have been steady with nutes, water, temp, RH etc.....what am I missing? Nitrogen? Or giving too much of? P/K?

Why only some plants?

 

[mysticepipedon]

Looks kind of like light burn.

 

[BurnzYzBudZz]

Hps, led?
Temps humidity?
Coco soil?
Feed?

Take a closer pic of the plant

 

[HerbalEdu]

yeah i ll tend to say heat stress too

as BurnzYzBudZz say, give us more infos about your set up, that would help.

 

[dean1963]

from the symptom guide i look at,( it's on the web so it must be true ) heat stress makes the leaf tips curl up and light burn makes them curl down like in his pic.
i'm a know nothing rookie so take that with a grain of salt

 

[RainFlowerFarms]

Sorry everybody, busy day. Here's the set up....

6 Phantom 1000 hps at 845w
6 CDL 315 Metal Halide
3.5ft away from canopy
Checkered pattern....
10 gal pots.
Batch 64 moonshine medium

Weekly nutes and additives all added on Sunday when they feed....
GH nutrients.....week 4 flower
Great white instead of rapid start
Mammoth P...40ml
Monster bloom....1 tbsp
Recharge 1/2 recommended dose
RO water
6.2 ph for flower....6.0 for veg

Temp is consistent 73....
RH usually between 55-61%

12 inch and 8 inch ac infinity in line
5 hurricane wall mount fans....
1 huge shop fan....
1 medium shop fan...
2 small fans in middle of garden on floor....

Maybe lack of nitrogen??
They are all 6ft+ plants....
40 plants......

Eat like champs....1400ppm

 

[BurnzYzBudZz]

The only thing I’d say is the temps are a bit low. Also You didn’t say if you were supplementing cal mag as you’re using RO water. Not sure if the moonshine mix is soil or coco, which would determine if you’re watering daily or not.

 

[RainFlowerFarms]

The only thing I’d say is the temps are a bit low. Also You didn’t say if you were supplementing cal mag as you’re using RO water. Not sure if the moonshine mix is soil or coco, which would determine if you’re watering daily or not.

Yes calmag with every RO watering.

Moonshine is a coco blend. Watering every other day