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HELP! Light green spots on leaves! What is this?

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Bartholomew

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Hey Furley, take a look at the link. All info there on my current grow. Made a new topic cause I couldn't add the "HELP!" prefix and change the title on the other topic.

But to answer your question, Canna Coco Professional+ pre washed, pre buffered to 5.8pH loose coco. Nutes are Canna Coco A+B and all Canna additives + Sensi Cal Mag. Going by Canna manufacturer schedule.
 
Bartholomew, I would say look at rising your PH up to 6.3. Cal and mag need each other to absorb and is best done at 6.3 pH. My second suggestion is it looks like you may have wind or light stress with the curled up edges of your Leafs.
My third suggestion would be to put your details in your signature for the fastest help you can get. I did click on your link but I don't have time to read the whole thread off this topic and since it wasn't at the top it's was faster for me to ask.
On the top right-hand corner click on your username
Click on user settings
Click On the account tab
Scroll down and click on edit signature
Add your prudent grow information.
You have a calmag deficiency, looks like
 
no no, Yes i've been feeding every day once a day full strength. 1.5L nutrient water per 20L plant pot. The nutrient water is always ph'd to between 5.6-6.4
No nutrient burnt tips so far.
 
Here is were the info in your signature really helps the big picture.
You are over watering your plant In my opinion. Not saying a grower can't just feed pre-measured water daily to their plants but it usually comes with experience and a lot of other factors that just haven't been learned until you have multiple grows dialed in.
my suggestion to you would be to flush your plants with pH water at 6.3, catch the 1st bit of water that comes out the bottom of your pots and check your runoff pH number, bet it's around 4.0 also check your Ppms you could be surprised, those numbers needs to be around 6.3ph and 600 to 800 MAX ppm. now I don't grow with canna line but I think you are using to much nutes, especially everyday! you should give plain ph water then feed then plan ph water then feed over and over, this is the best fell safe method for cannabis in Coco.
My biggest suggestion is to up your amount you give and increase the time in between watering/feeding, IMO you should be at 5 to 6 liters of water( just enough to get a little run off out the bottom of your pot) every 3 to 5 days. Flush your plant and LET IT DRY OUT COMPLETELY before re-feeding it, it will not die if it takes a week.you still have a calmag deficiency and curling leaves and spots can be a sign of Nute Burn.
 
I'm gonna get a digital soil ph tester in a few days to get that exact root ph. So far the runoff has been in the normal. The high ppm is due to going by Canna nutrient schedule. Full strength at this stage 900ppm total it says. Since cal mag isn't part of their schedule a full dose of cal mag raises the ppm to around 1000 and add ph down the total ppm will be around 1100 or so.
I let it dry in the first few weeks, going for a hydro experience now.
Curling leaves are from a week or two ago when I had a ventilation accident. The temps raised to 40C for some hours. Fixed that and have had no problems with temps or curling since then. Temps are constant 20.5C - 26C.
Honestly the spots don't resemble nute burn. The spots resemble tobacco mosaic virus but it's really unlikely that the plant is infected.

But I'll try your suggestion once I get the soil ph meter. Thanks!
 
Hey Daas, If you don't mind, could you take a look at my main grow topic? This topic was crated for the sole purpose of redirecting the discussion to the main topic. There's detailed info there. I think I even tagged you.

https://forum.growweedeasy.com/foru...-second-grow-need-help-with-drip-system/page2

But to your question. I'm pulling hard fresh winter air straight into the room with an inline fan, quite small though. No exhaust as of yet, probably gonna install an exhaust into the house tomorrow and duct the lights. Right now the 1000W + 600W lights hold pretty good temp. The heat is offset by the intake air.
The grow room air goes into the rest of the house due to air pressure.
 
Yes I'm aware of that but I'm using a drip feed system. Coco can be treated like soil when hand watering but it can also be treated like hydro with a drip feed system or even by hand watering. It's hard to over water in coco. I'm using airpots and fabric pots.

I think the conversation is getting derailed here. I don't really have a problem with the "spots" on leaves because the plants are growing rapidly. I just want to know what the spots are and should I be worried. I have not found any similar symptoms on the net after extensive searching. The only one that came close was TMV.
 
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