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Leaf discoloration

in Grow Community

I have seen this discolor increasing over the last week and am not sure what is causing it.

I am growing Fox Farm Ocean Soil under LED and am two days over week three of flower.

5 answers6 replies

Comments (11)

shadowalex1995

Oct 17, 2021

The leaves today are also looking a little worse.

shadowalex1995

Oct 17, 2021

I just got a new TDS and it is saying a reading of around 2000.

Cap Stone

Oct 17, 2021

Replying to

Hi, is that the PPM going in or from the run off? If that is from the run off, can you also get us the PPM going in. 2000 does seem a bit high.

If my run off was at 2000 PPM and the leaves looked like that, I would flush her with PH'd water until the run off was at least in the 600 or lower range. After she dries out from that, you can go back to what you are feeding now which seems ok or even a bit lite.

Good luck!

shadowalex1995

Oct 18, 2021

Replying to

@Cap Stone 2000 is the PPM of the run off. I did not think to grab a reading before putting it in.

Mr. Grow It

Oct 18, 2021

Replying to

@shadowalex1995 Probably nutrient lockout due to over-feeding. You may want to flush.

shadowalex1995

Oct 12, 2021

Sorry for the late reply but I appreciate all the comments. my run off PH is at a 6.2 and unfortunately I don’t have ppm at this time. I have been feeding CalMeg with almost every watering and am feeding a half dose of fox farm nutrients every other watering. They are growing under a Mars hydro LED at 75% power. The average humidity has been around 65% with an average temp around 84. Typically I am watering every other day about a half gallon per plant.

Mr. Grow It

Oct 17, 2021

Replying to

Without the PPM measurement, we are just guessing what the problem could be. It could be too low of PPM indicating it needs a feeding, or too high of PPM causing a nutrient lockout.

Cap Stone

Oct 10, 2021

Hi, they look hungry to me, but like @mwhite9829 says, we need more information on what you are feed them.

Yellow leaves aside, those are some beautiful looking plants! If you can get the yellow leaf issue under control, you should have a real good yield.

mwhite9829

Oct 10, 2021

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Could you give us a little more info, nutrients, how often, pH and ppm if possible, some environment conditions?

dgreen2178

Oct 10, 2021

Replying to

@mwhite9829 do you think it could be the bottom leaves not getting enough light

mwhite9829

Oct 10, 2021

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Replying to

It's not impossible, but looking at what I can see the worst leaves at bottom and symptoms going higher but not as bad I think there is deficiency in one or more of the mobile nutrients. I always start with N-P-K, Ca, Mg, and usually 80% or more the problem is there. Not always but the majority of what I find. I usually won't jump to light issue until I've eliminated deficiency, pH, or excess issue. Tons of routes and different methods, that's just what Ive gotten accustomed to. Would be better if seen at the beginning of issue.