Yellow leaves

what causes those scars?
26C temp %50 humidity.
Flow week 4.
300W leds at 40cm height and couple 23W CFLs at 10cm height from canopy.
3liter pot watering every 3 days or so.

As I searched in the forum, everything in my setup seems ok. I dont know if the lights or under/overwatering causes this. Marks only appeared on the side where CFLs hang

Cut back on your feeding. Looking a bit too green.

I'd say it's light burn or mute burn mate, try upping the lights a bit first tho, I had something similar with CFL's not long ago

PineappleExpress1007 said:

I'd say it's light burn or mute burn mate, try upping the lights a bit first tho, I had something similar with CFL's not long ago

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How do you Light burn bottom leaves and skip the tops??

Jypsy Dog said:

How do you Light burn bottom leaves and skip the tops??

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Cfls hanging from sides, also maybe its nuteburn.

cansin said:

Cfls hanging from sides, also maybe its nuteburn.

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Grew with CFL for 2 years, unless you lay the bulb on the plant or it grows into it..... TUFF to do.

CFL's won't be an issue SOON. There discontinued by the major MFG's.

Jypsy Dog said:

Cut back on your feeding. Looking a bit too green.

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What do you mean by cut back? Should I skip a week of feeding or?

Jypsy Dog said:

Grew with CFL for 2 years, unless you lay the bulb on the plant or it grows into it..... TUFF to do.

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Nah they are at 10-12cm distance. And Leds are at 40cm distance. For the burned leaves leds are at 50-55cm which is pretty far. Recommended distance by the led company is 60 for veg and 40cm for flow.

So I with that said, I think its not lightburn, instead nuteburn maybe. Usually I give every sunday but last week I fed her on friday which was 2 days earlier than scheduled time. Didnt expect it to become a problem like this

Try Water -Water-Feed. Good dry up between.

Greetings. That's a nute burn from too much N. EC of solution? Didn't say what the medium is but it doesn't go feed-feed-feed.

Either feed-water-feed or feed-water-water-repeat.

Over wet perhaps as well.

Cx2H said:

Greetings. That's a nute burn from too much N. EC of solution? Didn't say what the medium is but it doesn't go feed-feed-feed.

Either feed-water-feed or feed-water-water-repeat.

Over wet perhaps as well.

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Im using biobloom, not sure about ingredients. Every sunday Im feeding and then watering two times till next sunday. Using rain water or fresh water from river both for watering and feeding. Didnt check the pH tho.

And I can say the soil doesnt dries before I water again. I dont know how 3 liter pot doesnt go dry in 3 days.

cansin said:

Im using biobloom, not sure about ingredients. Every sunday Im feeding and then watering two times till next sunday. Using rain water or fresh water from river both for watering and feeding. Didnt check the pH tho.

And I can say the soil doesnt dries before I water again. I dont know how 3 liter pot doesnt go dry in 3 days.

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Yeah they aren't drinking alot. I got 7ga pots that go bone dry in 3 days. Odd but not bad.

I read somewhere that you need to cut rain water with tap or some sheet happens. Don't QUOTE me on that though.

You may be over watering if the pots stay wet. I water daily but it's automatic and only drop 1/8 of a gallon on those 7ga.

So you are saying you don't test your feed water any? No ec, pH etc?4

Week 4 is PK bump time.

I would back off some of the water for now, don't want root rot lurking.

Week 4 they should be acting different.

Jypsy Dog said:

How do you Light burn bottom leaves and skip the tops??

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Like he said it's only on the side where the CFL hangs so what not to say it's light burn ? And like I said could be nute burn either one ain't it

Jypsy Dog said:

Grew with CFL for 2 years, unless you lay the bulb on the plant or it grows into it..... TUFF to do.

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I've grown for nearly 2 years now, don't mean we know everything, I'm just giving my opinion, a light doesn't have to touch the leaves at all to give light burn mate

PineappleExpress1007 said:

I've grown for nearly 2 years now, don't mean we know everything, I'm just giving my opinion, a light doesn't have to touch the leaves at all to give light burn mate

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Agreed. I got some CoB's burning the sheet outta the plants in the cob space that are 22" above.

I know mate you've got to be careful, just cause their cfls don't mean they need to touch to give light burn, probs is light burn if it's just where he's got his lights, I had it with my last grow using a 250watt CFL

Cx2H said:

So you are saying you don't test your feed water any? No ec, pH etc?4

Week 4 is PK bump time.

I would back off some of the water for now, don't want root rot lurking.

Week 4 they should be acting different.

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Well it is my first grow and I am not fully equipped yet. Gonna order a pH test and solutions soon. I know that biobloom is PK fertiliser but i dont know the ratio etc.

Not sure lightburn or nuteburn but as said before, lights are at proper distance but I messed with feeding time a little so chances are higher that its a nuteburn.

Anyway, I put the lights little more up for caution and gonna water couple more times before feeding again.

It's all good. All things considered, you are doing great.

Remember don't over water that soil.

PineappleExpress1007 said:

I know mate you've got to be careful, just cause their cfls don't mean they need to touch to give light burn, probs is light burn if it's just where he's got his lights, I had it with my last grow using a 250watt CFL

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The location of the burn tells me it's not the light.... Unless the light was laying on it.