Upper leaves are turnning yellow and down

[PioneerXX]

Hi icmag.

Please help.

This auto Jack Herer at day 45. Upper leaves are turning yellow and down. Lower leaves are green and healthy. I dont overwater her, i use organic nutes which has plenty of N so its not nitrogen deficiency. I buy ph ballanced water so it should not be ph. I started to use AN Big bud a week ago.

Sorry for bad pictures.

Maybe somene can help.

Thanks.


Cheers.

 

[PioneerXX]

[No message]

 

[troutman]

Nitrogen deficiency starts normally at the bottom. Could be lack of magnesium or iron?

 

[PioneerXX]

Nitrogen deficiency starts normally at the bottom. Could be lack of magnesium or iron?

Could be.

 

[PolyChucker]

Check out a leaf chart. All the deficiencies have very specific leaf expressions. Like when the veins are yellow and the leaf is green versus the veins green and in-between yellow - those are different deficiencies. Could be potassium zinc iron magnesium. I recently had a problem with yellow around the border of the leaf. I think that was mag.
For me I use NPK and calmag plus to cover the bases. They’re all interconnected though. So if you have a lot of N, then you need to balance with other nutrients like metals. I use between 5-1-1 and 10-2-2 for veg plus a squirt of cal mag plus, if there are signs it’s needed. Calmag plus is to treat any “veining” by providing a lot of micro supplements that you need when you add a lot of NPK.

ive been experimenting with fish fertilizer with all my garden plants. I was able to get my lime tree growing much faster with darker leaves by giving it the fish fertilizer 5-1-1. It started fruit but they have been completely stalled for months - only pea sized. Now I’m reading the plant must need P or K since it looks great otherwise from all the N. So you kinda have to start with the right amount of water, then try some N, adjust that for best response, then figure what else it needs - if you wanna supercharge the growth

 

[Creeperpark]

Your pH is swinging higher and starting to lock-out iron. It looks like it may be starting to go above pH of 7, and not allowing for trance nutrient's to exchange. You say you buy pH balanced water and that tells me you have a 7 pH water, unless it distilled or RO. The only way to know for sure is to is to do a pour through and get a reading. The next watering day, Take a gallon of distilled water and water until you get some discharge out the bottom. Catch about 250ml to 500ml in a cup, and use a pH pocket pen to get a reading. Its easy to drift higher when using bottled water.
Monitor your pH and keep it consistent for the best nutrient exchange.

 

[Creeperpark]

You can fix it by fortifying your water with Cal-mag "plus". It has to have the "PLUS" for extra iron.

 

[PioneerXX]

Thanks for the informative replies

 

[Tynehead Tom]

have a look at the leaf charts again before you start dosing a calcium or magnesium deficiency or lockout. Nitrogen, Calcium and Magnesium issues start at the bottom of the plant affecting the mature leaves first. An issue starting at the top of the plant is something more serious in my opinion and may or may not be remedied with a quick fix. You want to look at the Mobile and Immobile Nutrient Excesses and Deficiencies Chart for Cannabis paying particular attention to the issues that start at the top of the plant, not the bottom.

 

[Creeperpark]

Those charts are ok, but if you are already using a "complete fertilizer" and start adding stuff, you will run into problems. Since he's using a complete fertilizer, then it wouldn't be from lack of nutrients Tynehead Tom. If there's plenty of nutrients available in the substrate, the pH is most likely the problem. The iron starts in the top leaves, and using cal-mag is not for addition of calcium and magnesium or for a nutrient use, but to lower the pH in the water. Lowering the pH and the addition of 0.1% chelated iron in Cal Mag Plus, will make iron available and if the plant needs it, then its available. If the plant doesn't need iron, its not a big deal, you just have a lower pH.

 

[Tynehead Tom]

Not disagreeing but for arguments sake I urge all new growers to familiarize themselves with the charts regardless.
I also teach every new grower , and there have been many over 30plus years of doing this, that PH is everything....
There is too much info missing from the OP's post for me to make the assumptions that his "PH Balanced" water is PH 7.
For example I buy 5 gallon bottles of RO water , it has 0PPM and PH of 6 and some would call this PH balanced depending on the media they are growing in.
I also can't assume that he is using a "complete fertilizer program" based on the information provided in the thread thus far.
I also have no information on the "substrate" or media the OP is growing in.

So I won't try and diagnose the issue without that information other than to tell the OP that he needs to check the leaf chart for issues that start at the top of the plant and go from there.
It very well could be an Iron deficiency or it could be something else, we really can't tell as that would be to assume based on too much missing information.

 

[Creeperpark]

He stated that he was using "ph balance water", balanced, I take to mean 7 pH if that is the case. The pH range goes from 0 - 14 and so I take that to mean 7 pH. Also he didn't say anything about RO water and so I take it, he is using store bought gallon bottled with a pH of 7. Now putting the pH aside, if you add a little cal-mag-plus (126 ppm) to the bottled water and give it to the plants, it won't hurt anything, maybe it will "add a little iron" and darken up the leaves a little. However if you put "extra" fertilizer on the plant when its not needed you will fuck it up. I don't recommend putting extra fertilizer on any plant without knowing the what the TDS or EC and pH are, charts or not. . I've seen more newbies fuck their plants up with those charts than do any good with them. When using a complete fertilizer there's no need for addition of nutrients. However if you are using filtered or RO water you need to fortify the water with cal-mag unless you are totally organic.

 

[PioneerXX]

This is getting out of control...

I ise bottled water and distilled water mixed with nutes...

I ll buy cal mag today and see what happens...

 

[PioneerXX]

So you guys think its because od high ph in soil right. And the plant cant take nutes..

i added 15 lemon drops in water and wattered her. How can i save the plant?

Pls help

 

[PioneerXX]

Just purchased ph meter and ph down. I gotta save her

 

[PioneerXX]

So I tested run off water from the holes and the ph was 5.75. I m kinda confused.
my bottled water ph was 7.

I think its not ph problem people.

This has to be cal mag or iron deficiency.

 

[Tynehead Tom]

cant help you unless I know the answer to these questions

What is in your pots for media? a premixed store bought soil , soilless mix such as promix or sunshine 4, coco coir, rockwool? need to know this
What is the starting PH and EC/PPM of your water before adding anything
What is the NPK of the food you are using
What is the EC/PPM of the solution once mixed

run off of PH 5.75 after a flush of PH7 ,,,,, did you use plain water with no nutes?

My immediate response if these were my plants would be to flush them with PH 6.8 with 1 teaspoon per gallon of Epsom Salts until the runoff was in the 6.2 to 6.3 range but I am growing in sunshine mix 4. once I see 6.2 to 6.3 in the flush , the last application will be a properly PH'd Nutrient solution with a teaspoon of epsom salts. This will provide magnesium with the probably unnecessary calcium that a CalMag product might provide. I do not see the signs of a lack of calcium but I do see that something is most certainly locking out some essential stuff.

 

[PioneerXX]

cant help you unless I know the answer to these questions

What is in your pots for media? a premixed store bought soil , soilless mix such as promix or sunshine 4, coco coir, rockwool? need to know this
What is the starting PH and EC/PPM of your water before adding anything
What is the NPK of the food you are using
What is the EC/PPM of the solution once mixed

run off of PH 5.75 after a flush of PH7 ,,,,, did you use plain water with no nutes?

My immediate response if these were my plants would be to flush them with PH 6.8 with 1 teaspoon per gallon of Epsom Salts until the runoff was in the 6.2 to 6.3 range but I am growing in sunshine mix 4. once I see 6.2 to 6.3 in the flush , the last application will be a properly PH'd Nutrient solution with a teaspoon of epsom salts. This will provide magnesium with the probably unnecessary calcium that a CalMag product might provide. I do not see the signs of a lack of calcium but I do see that something is most certainly locking out some essential stuff.

Soils is gorilla pro mix. Its a pretty good soil.
Water ph 7. no idea about EC/PPM
I used some local 100% organic nute called biohumus and big bud. I mixed distilled water and bottled water to feed the plant. I only used 1/4 strengh of recommended nutes.

 

[Creeperpark]

Don't panic and do anything out of desperation, and putting a lot of stuff in the water. If you got yourself a pH meter then you saved the day. If the soil is wet, don't do anything now, let it dry out. On the next watering day, do a pour-through and catch the run off for testing and test the pH. If you keep the soil wet you will cause yellowing leaves and hurt the roots from lack of oxygen and cause rot rot. If you use too much fertilizer you can cause yellowing leaves too. Let it dry out for now!

Your problem can be caused by one of many different reasons. When posting a photo, post one of the whole plant in the container, and please give all the details for faster response. Soil, water type, nutrients and how much nutes you use and how often.

 

[Creeperpark]

Don't flush your soil, that will fuck everything up! Now that you tell me what kind of soil and food you are using, I know what you problem is now, your plant is hungry. I thought you knew what you were doing from the first posted photos, my bad.
To grow weed, and know what you are doing, you need to buy a TDS or EC meter and a pH meter to monitor nutrients and pH. Its easy and fun to do, a 1st grader can do it. When you do a pour through out the bottom of the plant, just catch a little of the run-off water and use your meters to test the EC and pH. If you have too many ppms in the dis-charge, don't fertilize, if not enough ppm, then fertilize, Its so easy with meters.

ICmag community, it doesn't hurt to fortify distilled, RO or rain water with cal-mag (126ppm). For total organic water just a pinch of dolomite lime bubbled with a air stone.