Is this a sign of light burn?

J

jamesking614

New Member
This is my first attempt at growing, strain is White Widow Auto, its a little over 4 weeks in at this point, these yellow marks just started appearing on the top yesterday has been isolated manly to the bottom leaves until now, I'm not sure if this is nute burn or light burn. its not really easy to see it on the top but its only very small now but its showing signs of the same issue. I turned the light off at this point.

It might be worth noting this is growing inside a 5'7" grow tent under a 300 watt grow light.

Please and thank you also hi I'm new here :)
 

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Damn I was afraid of that, so I have this sitting in mirical grow organic potting soil, will I have to transplant this to a better soil or is there another option?

I guess at this point its worth noting I use straight tap water on it when I do water, ive ph tested my tap and it sits at around a 6.5-7.0 which I read was about right for soils anyway
 
burn is normally at the top of the plant fresh growth

That looks like lock-out, ph, or some kinda bug attack or root issue ?

how long ago did you transplant it ?
 
I haven't transplanted at all actually as I read up that autos don't like being transplanted, Its sitting in what should be about a 3 gallon pot
 
jamesking614 said:
I haven't transplanted at all actually as I read up that autos don't like being transplanted, Its sitting in what should be about a 3 gallon pot
Click to expand...

is it drying out fast enough ? Don`t seem like there`s much perlite or rock in that soil is it getting a good level of drainage ? that could be causing your issues

autos can have pretty weak roots yes. Auto indica`s seem to like to finish pretty small normally but they can go over a meter and yield 3 to 6 zips if you get a good one
 
The drainage is something I'm not entirely sure of. I know that when I empty the 32oz bottle I have during water sessions it gets spill over out the bottom and a small puddle forms but the soil itself dose stay wet for a long time, in fact ever since I stared watering it more it hasent fully dried up on the top but. I'm not really sure how to go about improving the drainage on the pot I have currently I made the bottom holes bigger then they were factory but could I maybe add more holes near the middle of the pot at this point?
 
If the soil isnt drying are you getting air exchanges? Whats the temp and humidity in the tent?
 
temp is currently 72F and humidity is 42%

my reader shows on the low/high ranges

temp 42-83f
humidity 32-71% (my guess is the high number was during one of the really hot days recently before we fixed our AC)

I have large fan running in the tent which moves a lot of air, enough to see the plant visibly sway
 
jamesking614 said:
temp is currently 72F and humidity is 42%

my reader shows on the low/high ranges

temp 42-83f
humidity 32-71% (my guess is the high number was during one of the really hot days recently before we fixed our AC)

I have large fan running in the tent which moves a lot of air, enough to see the plant visibly sway
Click to expand...
Not bad, just had to ask when I saw the bottom vents closed... but 42 is a bit low... roots dont like temps much below 60, hopefully the 42 wasnt for an extended period..remember, air exchanges are important too, not just temps...
 
jamesking614 said:
This is my first attempt at growing, strain is White Widow Auto, its a little over 4 weeks in at this point, these yellow marks just started appearing on the top yesterday has been isolated manly to the bottom leaves until now, I'm not sure if this is nute burn or light burn. its not really easy to see it on the top but its only very small now but its showing signs of the same issue. I turned the light off at this point.

It might be worth noting this is growing inside a 5'7" grow tent under a 300 watt grow light.

Please and thank you also hi I'm new here :)
Click to expand...
May be something has simple has getting the leaf wet during watering,but i would agree this is a nutrient burn rather than a bleaching,a bleaching is more of the leave's becoming very light in color,to the point that you can see through them in really bad cases.
 
tyke1973 said:
May be something has simple has getting the leaf wet during watering,but i would agree this is a nutrient burn rather than a bleaching,a bleaching is more of the leave's becoming very light in color,to the point that you can see through them in really bad cases.
Click to expand...
So is it generally not advisable to water the actual leaves during watering sessions because that is something I have been doing regularly?
 
I was overzealous about watering at first. Water only when the medium looks dry. You can mist the leaves lightly once or twice a day with ph adjusted water if your humidity is low. Also get some air flow around them.
 
Update

I've not watered for 24 hours and the marks have stopped appearing. Additionally the leafs that were showing burn have started to show signs of recovery. At this point I also properly PHed my tap down to a 6.5 so I'm thinking that might help to decrease the over abundance of nutes getting to the plant my tap sits at about a 7.0 unaltered.
 
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