Blotching problem on leaves in DWC

Organorf

Member
Hey guys.
I am having some troubles with my new grow, hopefully someone can help me out.
I am getting this blotches on my leaves and it seems to progress very quickly. See attached pics.
First of all, Cannot be heat stress, my tent is at 23deg Celsius.
Cannot be light burn as light is 1meter away from top leaves.
It cannot be overwater/underwater, this is DWC system and res is at same temp as room.
PH is 5.7-5.8.
I use General Hydrophonics (Micro(For Soft Water), Grow and Bloom) at 1ml/l each as they are still small.
I add 3tsp of Cal/Mag Nitrate per 30L res, and 3ml of H2O2 per 5Litres of Water.
I also use RO water for my grows.
Growing under Geyapex 300W LED.
Started them off in Rockwool Cubes then transplanted over into DWC system recently, but problem started already in Rockwool Cube. I thought it was just a genetics thing or maybe I was not so careful with my feeding (It came onto the leaves) but its not.
The first pics 1-1 - 1-3 was last night, and the second pics 2-1 - 2-4 was the next morning. So this is happening quite fast.
I did notice one of the roots was turning green though.
Both my plants are growing exactly the same but the one plant is extremely happy and healthy and the other...well...has this blotching happening.
Can someone please help me figure this out.
A mate of mine had the same issue once in a Coco grow, but he just pulled the plant and started over, never knowing what the cause is. I would really like to know, so that I can be prepared in the future if this ever happen again.
 

Attachments

Organorf

Member
Might be a calcium deficiency.
As mentioned, Cal/Mag Nitrate is being added to my res at 3tsp/30L

Don't think it is a deficiency, I know deficiencies and this is something that I cannot find the answer to.

Calcium deficiency also starts off with little brown spots
 

Rocket Soul

Well-Known Member
It could be calcium def due to low temps. Led grown plants without ir needs higher temps, around +27 to thrive. Maybe simply adding a incandescent bulb of some sort to increase IR amd transpiration.
 

Organorf

Member
It could be calcium def due to low temps. Led grown plants without ir needs higher temps, around +27 to thrive. Maybe simply adding a incandescent bulb of some sort to increase IR amd transpiration.
Low Temps on foilage? I have a geyapex 300W with a pretty potent cob in the middle, will add a pic of light spectrum. It is only a small 800mm x 800mm x 1.2m tent and should be enough. Root zone is at 25.3°C and tent at 23.4°C. It is winter here.. The other plant in same tent is thriving, same nutes, same temp exactly everything the same. I have gone through allot of deficiencies in my journey through the years, but I'm starting to think it's either a genetic disorder, a parasite or a root issue.
 

Attachments

Organorf

Member
Could be nutrient deficiency but at this point is best not to over do the nutrients. Just keep her like that for a few days if it starts getting worse then just feed her a little bit more.
The res is at 790ppm, and it is only on its 4th node, so don't think I should push it just yet. I don't really know if it is a deficiency. Looked up all deficiencies over the last couple of hours and nothing looks like this. Thinking it might either be root issues, genetic disorder or a parasite.
 

hellmutt bones

Well-Known Member
The res is at 790ppm, and it is only on its 4th node, so don't think I should push it just yet. I don't really know if it is a deficiency. Looked up all deficiencies over the last couple of hours and nothing looks like this. Thinking it might either be root issues, genetic disorder or a parasite.
I mean to me she looks healthy. Little stuff like that doesn't really alarms me unless its getting worse.
 

Organorf

Member
For how small it is, the ppms do seem a little high
It is pushing the 5th Node. There is no visible nute burn on any of my plants, including the sick one, so it cannot be too high. All of them are thriving and look very happy, obviously except the sick one, which the new growth also looks healthy. I am going to pull it, as it seems to progress faster than I thought. Just going to start over and never buying seeds from the place I bought it from again. Going back to Dynafem. It has always been the best genetics for me.
 
Top