What seems to be the problem?

luxonator

luxonator

Active Member
1.2 x 1.2m grow tent
220m3/h inline fan + carbon filter for ventilation
2x Sanlight EVO 4-120 Full spectrum leds
General Hydroponics Aquafarm (35L reservoir, 25L medium)
Medium is 1/3 LECA and 2/3 COCO mixture
Advanced Hydroponics of Holland nutes with assorted supplements like Biobizz CalMag and Growth Technology Hydrogen peroxide
EC 1.2
PH 6
Temps around 27-30C and Humidity 40-65% depending on the day and time of the day.
I have 5 plants in the hydro system and one plant in soil.

Noticed this on the third week of veg, plants been under the LEDs for around a week at that point. Light power at 40%, so thats a combined power of around 200W
I can see this only in like two plants out of five, so kinda hard to figure out the culprit...

The plant in soil shows zero problems and is generally way greener and healthier looker than the ones in hydro.

Does this ring any alarm bells? Underfert? Overwatering?

problem1.jpgproblem2.jpg
 
C

cage

Well-Known Member
Can't quite put my finger on it.
Enviroment seems good and overall condition too.

From the photos, I'd say the symptom seems to be on bigger older leaves and it's pulling some nutrient out of it. This would suggest one of the mobile nutes. But doesn't really look like typical NPK or Mg/Ca deficiencies to me.
How does the affected leaves look from under?
Or how much you using hydrogen peroxide? Thinking if it could be culprit if one of the dosages was on the higher side.

edit: Couldn't find what the nutes actually consists as for Mg/Ca goes.
 
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luxonator

luxonator

Active Member
cage said:
How does the affected leaves look from under?
Or how much you using hydrogen peroxide? Thinking if it could be culprit if one of the dosages was on the higher side.
edit: Couldn't find what the nutes actually consists as for Mg/Ca goes.
Click to expand...
The leaves look completely normal underneath. New growth shows a tiny bit similar symptoms but only on a few leaves.
I give H2O2 as the bottle recommends. Usually 1ml / liter. 2-3 times per week. (They have started to drink properly only now, so previously I had to refill the reservoir only about once per week. But I kept monitorin that the ph and ec are not swinging too much)
 
pegboy

pegboy

Well-Known Member
My guess is simple variegation. Possibly genetic. I don't think its a problem. Or TMV but that would be a long shot. .
 
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luxonator

luxonator

Active Member
1212ham said:
Never let coco dry.
Never use water only, always with nutes.
Feed to run-off, around 5.8-6.2 ph.

Cocoforcannabis.com
Click to expand...
I now understand there might have been a slight misunderstanding about feeding and schedules etc. I guess I didn't explain properly or thought/assumed everyone is aware how these systems work. My apologies.

The coco will never be dry. The system recycles the water from the reservoir top and it drips to the growing medium and goes thru it and drips back to the reservoir. The airpump that is doing the work to move the nutrient water and oxygenating the water is working 24/7 to keep sure the plant doesn't "drown" due to the medium being constantly wet.

Screenshot 2024-06-14 092444.png

When I see the reservoir getting close to being empty, I make a new solution and refill. I keep monitoring ph and ec daily and adjust the water + nutes accordingly on the next refill.

Anyway, the "problem" doesn't seem to have gone worse or spreading. Similar stuff on few leaves here and there but otherwise things seem to be going smoothly.

Thanks for the information and suggestions everyone

edit: More info about the hydrosystem I use + fixed typos
 
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