Leaf curling and dying

[sontnewb]

I have 2 strains that are curling their leaves and then drying up and falling off, not sure what the problem is, attaching a pic to this post..
I am going 2/3 strength fertlizer every 3rd watering.

 

[daTenshi]

Hey,

Could you answer as many as these questions as you can:

REQUIRED INFORMATION FOR GROW SUPPORT

What Strain is it?
Is it Indica, Sativa or Hybrid? What percentages?
How Many Plants?
Is it in Vegetative or Flowering Stage?
If in Vegetative Stage... How Long?
If in Flowering Stage... How Long?
Indoor or Outdoor?
Soil or Hydro?
If Hydro, Reservoir size?
If Hydro, Reservoir Temperature?
If Hydro, what type of Medium?
If Hydro, what type of Setup?
If Soil... What is in your Mix?
If Soil... What Size Pot?
Size (Wattage) of Light? How Many?
Is it Air Cooled?
Temperature of Room/Cabinet?
RH of Room/Cabinet?
PH of Medium or Reservoir?
Any Pests?
How Often are you Watering?
Type and Strength of Fertilizers used?
Size or Square Footage of Room?

This information is necessary for accurate support to be given.


Without any additional info, that type of pattern looks like she is loosing a lot of moisture, the environment being really hot, too hot for her to handle.

On the other side I am also seeing some type of micronutrient deficiency, probably Mg, can't be sure without knowing what is your medium and pH.

But priority is moving the air around and cooling her off, heat stress is very bad, specially in flower.

 

[Uzennydin]

The cause may be burn, overfeeding or overwatering.

 

[sontnewb]

i'll try and answer as much as i can... there are 4 strains and only 2 are showing the problems (they are away from each other)

What Strain is it? White cookies & White rhino
Is it Indica, Sativa or Hybrid? What percentages? Hybrid both
How Many Plants? 98 in a sea of green
Is it in Vegetative or Flowering Stage? flowering
If in Vegetative Stage... How Long?
If in Flowering Stage... How Long? 2 weeks
Indoor or Outdoor? indoor
Soil or Hydro? soil
If Hydro, Reservoir size?
If Hydro, Reservoir Temperature?
If Hydro, what type of Medium?
If Hydro, what type of Setup?
If Soil... What is in your Mix? run of the mill potting soil 2/3 perlite 1/3
If Soil... What Size Pot? 4 liter- short plants out of veg
Size (Wattage) of Light? How Many? 3 600 watt
Is it Air Cooled? yes-filter sucking smell out into veg room, fan blowing in cool air
Temperature of Room/Cabinet? room temp 78 degrees with lights on, 72 degrees with supl. heat in the dark (70 degrees)
RH of Room/Cabinet? 80-85%
PH of Medium or Reservoir? N/A
Any Pests? No pests
How Often are you Watering? watering 2x fert. 1x when dry to touch- moisture meter
Type and Strength of Fertilizers used? techniflora
Size or Square Footage of Room? 10'x10'

 

[DRM Ranch]

My understanding is that in flower you should maintain humidity to somewhere between 40-50% not 80-85%.

Watering and feeding in soil should happen when the pots media is nearly dry and the container feels light when lifted. Moisture meters are, in my opinion not the best option for determining when to water/feed.

 

[daTenshi]

Thanks for that info, it's really hard to diagnose could be a wide different things happening.


I still believe I see a strong Mg deficiency, can be caused by imbalanced pH. I would get some epsom salt or something and pH the water correctly and feed, or spray either one works.

Here's how nutrients get absorbed: