What are these yellow spots?

[aburan]

Hey I just found this in some of my plants. They look healthy regardless a couple of these yellow spots.

I haven't feed them with nutes yet. They are on their 3rd week and I'm starting the veg nutrients on the next watering.


View attachment 176707View attachment 176708

 

[dildano]

My bet is either light bleach or some calcium def but while we wait for someone more experienced, perhaps it would be useful you give more info on lights you use, PH soil, fertilizers etc.. (https://www.autoflower.org/f90/trou...uestions-first-before-posting-yours-8519.html)

 

[aburan]

-HomeBox L: 1x1x2m
-Kit 400 HPS Agrolite Gro&Flo + Wings Reflector
-Extractor Prima Klima 2 Speed - 220/360 m3/h
-Passive intake
-Hortinline 5W for air circulation
-11 liters Pots

Soil

-Composana Universal


I'm watering with ph of 6 and 6.5. I havent added nutes yet besides bio rhizotonic stimulator with 1/4 strength on the first 2 waterings. On the 3rd I didn't add anything.

Temperatures are 17-26 degrees (min,max) and humidity is 35%-55% (min,max). The lights are around 25 cm distance (Did the back hand test).

 

[dildano]

And what distance between the light and plants, also do you foliar spray? this would be relevant in case of a light bleach, I seen in the forums sometimes spots like that apear from water drops acting like a magnifier lens and burn leaves..

 

[aburan]

And what distance between the light and plants, also do you foliar spray? this would be relevant in case of a light bleach, I seen in the forums sometimes spots like that apear from water drops acting like a magnifier lens and burn leaves..

I do foliar spray to keep humidity up sometimes.

Light distance is about 25 cm.

 

[dildano]

Hmm.. not sure about 400w coz I have 600w but I think you might be a bit too close, also if you foliar spray, I'm even more sure on my first bet.. but I'm also a novice just my 2n'd grow maybe someone else will disagree..

 

[StormsEniGma]

when do you foliar spray, during lights out or lights on?

 

[aburan]

when do you foliar spray, during lights out or lights on?

Lights on when humidity is running low.

 

[StormsEniGma]

that could very well be your problem, droplets of water magnify light, I would recomend foliar spraying during lights out

 

[dildano]

This chart should help you determine the good distance for 400w it is in imperial units you need to do the conversion...