I'm a little bit worried

3TentFarmer · Jul 30, 2018

Ive look online for the answer but it seems everyone has a different read on yellowing leaves during flowering. Some say its root lock. Some say not enough Nitrogen. Others say a pH issue. Some say its normal during the flowering stage for leaves to turn yellow. What are some opinions and why? Thanks in advance.

I turned lights off just to get better picture without the 300W LED purplish hue.

PigKiller · Jul 30, 2018

Those leaves aren't yellowing, their dying. You definitely have a problem. Going to need more info, nutes, soil, watering, ph,RH, temps...anything you can think of.

3TentFarmer · Jul 30, 2018

pH is 5.5
RH 65-75
Temp 70-79
Only water when top inch of soil is dry.
General Hydroponics 3-2-1(Bloom, Micro, Veg.) Not often as I dont want to over feed it. Mainly just pH balanced water.

Worked last night and tonight so i may be sleeping and not answer right away.

xeningti · Jul 30, 2018

i would have thought some sort of temperate issue, leaved tend to curl upwards under high temps but i cant explain the colour...

3TentFarmer · Jul 30, 2018

Thats what i thought too, but the light doesnt put out much heat.

Zero_OS · Jul 30, 2018

did you measure the pH from runoff or do a slurry test? if runoff, how much did you let it drain before you tested the runoff pH?

Project Ponics · Jul 30, 2018

Slurry test for sure, looks like a pH problem to me, yellowing leaves are normal in flowering. But like @PigKiller said man, those aren't yellowing from using up the last of the nutrients in the leaves before harvest, those leaves are dying. It's clear to tell simply because you're not even close to harvest and they shouldn't be yellow at the stage your at in flowering. Not a N deficiency.

...do that slurry test, that's going to determine what I think is the problem. Then adjust pH accordingly.

Bernie420 · Jul 30, 2018

3TentFarmer said:
pH is 5.5
RH 65-75
Temp 70-79
Only water when top inch of soil is dry.
General Hydroponics 3-2-1(Bloom, Micro, Veg.) Not often as I dont want to over feed it. Mainly just pH balanced water.

Worked last night and tonight so i may be sleeping and not answer right away.

From what you posted your ph is to low. Its needs to be at 6.5 when you water in. I cant give you an exact reason what the bad leaves say and imo you probably have root issues now from what happened more than not, but this is what you do to fix it.

Flush out your pot with clean water phed at 6.5 at least two-three gallons shop vac all that up. Then renute at half strength add b-vitamins {superthrive} for the stress add microbes for any root issues and nutrient uptake. Add that mix to run off clean it all up and then leave it alone as far as watering anything else till the pot dries up. Pick off all the leaves that are 60% missing any green in them as they are trash and blocking light an any good leaves. You could get by without the b-vitamins but dont do this without the microbes in your water when you renute them.

You dont need to check ph runoff or do some sort of slurry test and get distracted with that stuff all you need is to know what you need to do to fix it and act on that and then you can go around and look at all the deficiency charts to figure out what had happened to your leaves if you want but what I told you is what you need to do to get it back on track.

3TentFarmer · Jul 30, 2018

First time grow so i have no clue what a slurry test is. Runoff test is self explanatory. So flush with 6.5 water and half nutes and watch. Going to research slurry test. Want to try it out just so i know how to do it. Cant learn too much. Thanks all. Will post pictures in a couple days of progress. Again, thanks for the information and ideas.

Bernie420 · Jul 30, 2018

3TentFarmer said:
First time grow so i have no clue what a slurry test is. Runoff test is self explanatory. So flush with 6.5 water and half nutes and watch. Going to research slurry test. Want to try it out just so i know how to do it. Cant learn too much. Thanks all. Will post pictures in a couple days of progress. Again, thanks for the information and ideas.

add the microbes its key to fixing your problem

3TentFarmer · Jul 30, 2018

Bernie420 said:
add the microbes its key to fixing your problem

Normal dose or Half?

Thegermling · Jul 30, 2018

3TentFarmer said:
yellowing leaves during flowering

This should happen (usually) at the late stages of flowering. And it usually starts from the bottom and the yellowing progresses upwards. If yellowing starts at the top and moves downwards then it can either be deficiency related or your lights burning the leaves. Also your leaves look like a ph issue. Ive had that before.

3TentFarmer · Jul 30, 2018

I'm thinking pH issue. Im messing around with my pH meter and its acting a little funky. Its not reading it correctly even when I add pH down to the water. Damn faulty equipment. I am going to pick up a better meter so I don't end up frying my plant.

Thegermling · Jul 30, 2018

3TentFarmer said:
I'm thinking pH issue. Im messing around with my pH meter and its acting a little funky. Its not reading it correctly even when I add pH down to the water. Damn faulty equipment. I am going to pick up a better meter so I don't end up frying my plant.

I recommend bluelab.

3TentFarmer · Jul 30, 2018

Just ordered a new one and should get it by the 2nd.

Thegermling · Jul 30, 2018

3TentFarmer said:
Just ordered a new one and should get it by the 2nd.

Make sure to always rinse the probe under tap water after checking ph and keep some tap water in the cap too. If it dries it dies.

3TentFarmer · Jul 30, 2018

Bernie420 said:
From what you posted your ph is to low. Its needs to be at 6.5 when you water in. I cant give you an exact reason what the bad leaves say and imo you probably have root issues now from what happened more than not, but this is what you do to fix it.

Flush out your pot with clean water phed at 6.5 at least two-three gallons shop vac all that up. Then renute at half strength add b-vitamins {superthrive} for the stress add microbes for any root issues and nutrient uptake. Add that mix to run off clean it all up and then leave it alone as far as watering anything else till the pot dries up. Pick off all the leaves that are 60% missing any green in them as they are trash and blocking light an any good leaves. You could get by without the b-vitamins but dont do this without the microbes in your water when you renute them.

You dont need to check ph runoff or do some sort of slurry test and get distracted with that stuff all you need is to know what you need to do to fix it and act on that and then you can go around and look at all the deficiency charts to figure out what had happened to your leaves if you want but what I told you is what you need to do to get it back on track.

How much of Micro should I add? Right now its 5ml per gallon.

Bernie420 · Jul 30, 2018

3TentFarmer said:
Normal dose or Half?

For the first one I would say at least 1/4 tsp per gallon maybe even a smidge more --- then about 1/8tsp per gallon as a maintenance application for future feedings once a week or as you feel needed.

Bernie420 · Jul 30, 2018

3TentFarmer said:
How much of Micro should I add? Right now its 5ml per gallon.

not sure on your nute application not familiar with your nute schedule

Beachwalker · Jul 30, 2018

3TentFarmer said:
pH is 5.5
RH 65-75
Temp 70-79
Only water when top inch of soil is dry.
General Hydroponics 3-2-1(Bloom, Micro, Veg.) Not often as I dont want to over feed it. Mainly just pH balanced water.

Worked last night and tonight so i may be sleeping and not answer right away.

Are you saying you feed at 5.5, or is 5.5 referring to your runoff?

I'm a little bit worried

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