Plants have yellowing leaves throughout

coreywebster said:

Consider how close your light is from your canopy. It has similar symptoms as sulphur def but sulphur would go yellow from start of leaf and work outward toward tips where light burn would be where light hits leaves easiest and if its more under one light fixture than the other then would make sense

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That sounds about right, problem is the light is pretty much maxed out to the ceiling with about 34 inch gap between the plants and the light.

Diabolical666 said:

I dont understand why you arnt following the ff feeding schedule... follow that and cutout the h2o2. How much molasses are you using and when do you start using it?

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Foxfarms feeding schedule is way to strong to go by the book, I have tried that and it literally ruined my plants, like I said the H2O2 has nothing to do with why the plants look the way they do I started using that recently and this problem occured long before I started using it

SPLFreak808 said:

Epsom salts, sulfer is usually mostly affected by parts that get light, starts at the top of the plant and turns it pale green starting from the petiole side however some strains manifest s-deficiency different then others especially under bright light. Not sure if thats your problem though, the plant is also pulling P from the fans too. We need to see how the leaf yellowed, its already pale so it makes it hard to diagnose without telling us what changes you've made before you seen this problem. Could very easily be a medium, feed problem too

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Only change I made is when they transitioned into flowering when I started using the flowering nutes, they may have gotten worse when I started adding that.

I have never had a problem with following the feed chart for ff. But I never added abuncha other crap to the mix either. GL

In the third pic you can see yellowing tips working inward. Some of the same symptoms though, green veins, red stems. Sad looking leaves. The odd spot.
If you are maxed out on light height its a tricky one, worth waiting for a few others to see if they agree with my thought. I often think of light burn with 5watt chips, but I could be wrong, I hope I am because its a dilemma with maxed out head room.

SPLFreak808 said:

Epsom salts, sulfer is usually mostly affected by parts that get light, starts at the top of the plant and turns it pale green starting from the petiole side however some strains manifest s-deficiency different then others especially under bright light. Not sure if thats your problem though, the plant is also pulling P from the fans too. We need to see how the leaf yellowed, its already pale so it makes it hard to diagnose without telling us what changes you've made before you seen this problem. Could very easily be a medium, feed problem too

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How much epsom salts should I use in a gallon?

coreywebster said:

In the third pic you can see yellowing tips working inward. Some of the same symptoms though, green veins, red stems. Sad looking leaves. The odd spot.
If you are maxed out on light height its a tricky one, worth waiting for a few others to see if they agree with my thought. I often think of light burn with 5watt chips, but I could be wrong, I hope I am because its a dilemma with maxed out head room.

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The third pic is a plant thats farthest from the mars II, that ones under the G8 and it has similar looking leaves.

SPLFreak808 said:

Epsom salts, sulfer is usually mostly affected by parts that get light, starts at the top of the plant and turns it pale green starting from the petiole side however some strains manifest s-deficiency different then others especially under bright light. Not sure if thats your problem though, the plant is also pulling P from the fans too. We need to see how the leaf yellowed, its already pale so it makes it hard to diagnose without telling us what changes you've made before you seen this problem. Could very easily be a medium, feed problem too

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As someone else had mentioned before it looks like its starting from the outside of the leaf and working toward the stalk, something else I should have mentioned is I have a mother plant thats beside all of these other ones thats under a T5 and it looks perfect, its probably just far enough away from the other lights to not be affected by them.

Well I believe that its most likely a sulfur deficiency so I adjusted my Ph to 6.5 and added 1 teaspoon of Epsom salts, hopefully this will fix my problem. I will keep you guys posted.

are you giving them cal-mag?

Cobrex said:

Well I believe that its most likely a sulfur deficiency so I adjusted my Ph to 6.5 and added 1 teaspoon of Epsom salts, hopefully this will fix my problem. I will keep you guys posted.

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So my strategy when finding either a deficiency or lockout is to fertilize with a complete fert, and go to basics. Just worry about NPK and micros, that's enough to give you perfect green leaves. I would Hold on the zymes and sugars and peroxide until the fert dosage is dialed just right.

The grow big has a good ratio, I find the ratio on the tiger bloom less than ideal however. When using the tiger bloom I used half dose of that plus half dose of the veg sometimes.

Ever try house and garden or GH or canna? I switched years ago to H&g never looked back. Feed every water, equal parts A and B. Super easy.

8thGenFarmer said:

So my strategy when finding either a deficiency or lockout is to fertilize with a complete fert, and go to basics. Just worry about NPK and micros, that's enough to give you perfect green leaves. I would Hold on the zymes and sugars and peroxide until the fert dosage is dialed just right.

The grow big has a good ratio, I find the ratio on the tiger bloom less than ideal however. When using the tiger bloom I used half dose of that plus half dose of the veg sometimes.

Ever try house and garden or GH or canna? I switched years ago to H&g never looked back. Feed every water, equal parts A and B. Super easy.

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The tiger bloom is so low because of the fact that I am also using the Soul Big Swell which is also a flowering fertilizer.

doobie57z said:

are you giving them cal-mag?

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No, I used it once in my last grow and seemed to make things worse.

Cobrex said:

The tiger bloom is so low because of the fact that I am also using the Soul Big Swell which is also a flowering fertilizer.

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Not sure if big swell has all the micros fox has in it. That's why for simplicity sake i tend to go for complete ferts. Never have to deal with a sulfur or a boron deficiency or anything weird like that. Just have to decide how much fertilizer, not which one or even how often. One decision not up to 3

So its been about 3 days or so and the plants appear to have gotten worse after giving them the Epsom salt on wednesday, I only did about a tsp per gallon but heres a picture of what most of the leaves look like now.

I suspect too much bloom fert. you're giving two or three different kinds? why?

polishpollack said:

I suspect too much bloom fert. you're giving two or three different kinds? why?

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I was using 2 different kinds, the big swell is suppose to be a bloom booster where as the tiger bloom is straight bloom fert. I fed them today since its been a week, all I used was 3 tsp of the big bloom, .5 tsp of the grow big, .5 tsp of the tiger bloom, and .5 tsp of molasses. I'm hoping that will help them. I'm gonna stop using the booster for now as well as the hygrozyme, and the H2O2.

Cobrex said:

I was using 2 different kinds, the big swell is suppose to be a bloom booster where as the tiger bloom is straight bloom fert. I fed them today since its been a week, all I used was 3 tsp of the big bloom, .5 tsp of the grow big, .5 tsp of the tiger bloom, and .5 tsp of molasses. I'm hoping that will help them. I'm gonna stop using the booster for now as well as the hygrozyme, and the H2O2.

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Too much bloom will also lock out secondaries/trace minerals too. Wait you use grow big/tigerbloom and a bloom booster on all plants and you only have 1 plant yellowing? Grow big is already 6-4-4 but it sounds like your using 6-12-6 or something

thats per gallon of PHed water? And why grow big, are you in week 5 of flower?

I think I can answer the question of why do this stuff. It's because the grower can. Many times people walk into a hydro shop and see all those products and convince themselves that they need to use it. Then they wonder why their plants are dying. Go easy on the ferts. For many growers that are starting out, using just foxfarm soil is a better idea. In hydro you need a ppm meter and perhaps follow a chart, but some people will give more stuff than what really needed there too.