Leaves turned yellow after watering!

[Greymalmo]

looks like a nitrogen defeciency, but someone told me a few weeks ago I had too much nitrogen and to stop feeding it...so I'm not sure! I just feel it's too early for the leaves to be turning yellow during flower, but it's my first time, so maybe not?

Flipped August 25, about 28 days ago. At least another month before harvest expected. Bruce Banger from Seedsman and Northern Lights from Nirvana, both have same issue with yellowing of the fans leaves. In 7 gallon pots with fox fire ocean soil since D1. The leaves looked fine last night. I included photos of the chemical makeup of the two nutrients I used. Watered 1 gallon with 1 teaspoon each of the CalMag and Florabloom...

 

[polishpollack]

You don't need to add fert to FFOF soil. 7 gallons ain't bad but 10 would be better.

 

[Aussieaceae]

Have you ample drainage / aeration?

Would seem too strong a coincidence it got immediately worse, after doing the rounds the previous day. (you likely overfert'd and locked right out)

Your ongoing problem (if you've had one this grow) mightn't be a matter of nutrient deficiency, but lockout.
Might be as simple as needing to water less frequently. Add more aeration / drainage to your soil. Or amend with dolomite lime.

7 gallons is a fair size. When you potted up, did you amend the soil? By adding dolomite lime, aeration / drainage etc?
(even organic matter, if you added it)

 

[Greymalmo]

Drainage is fine, about 1/4 of a gallon drains out when I water a gallon. I remove the drained water. I added perlite to the soil in the beginning. I did have been waiting for the soil to become dry in the top few inches before watering, so definitely not overwatering. It could be a PH issue with lockout. Thank you!

 

[polishpollack]

It's not a pH issue with lockout. That tends to be a myth. You have over ferted the soil, period. The plant doesn't know the difference. It will keep on consuming food if there is much present like one of those psychos that keeps eating without stopping and packs on weight. You've overweighted the plants with food and there's a good chance this will kill them and all the flushing probably won't help. Whether they survive will depend on exactly how overloaded the soil is. Time will tell. I've been reading these forums for 20 years and I still can't figure out how the myth of lockout got started. It's bad news because it has the grower chasing pH as the cause and if they just flush with pH adjusted water, everything will be fine. They end up baffled why doing so doesn't fix the problem. FFOF is made at the factory to be the way you need it. You don't need to amend or add or mix with perlite. I guess that's the hard part, trusting the company to be right. Live and learn, I guess. My posts are turning into one big goddamn commercial for FFOF. but it's true, the soil works fine by itself.
Start seeds or cuts in light warrior, let it get about 10 inches tall, then transplant to FFOF. Just give water from the tap, no adjustment necessary.

 

[Greymalmo]

It's not a pH issue with lockout. That tends to be a myth. You have over ferted the soil, period. The plant doesn't know the difference. It will keep on consuming food if there is much present like one of those psychos that keeps eating without stopping and packs on weight. You've overweighted the plants with food and there's a good chance this will kill them and all the flushing probably won't help. Whether they survive will depend on exactly how overloaded the soil is. Time will tell. I've been reading these forums for 20 years and I still can't figure out how the myth of lockout got started. It's bad news because it has the grower chasing pH as the cause and if they just flush with pH adjusted water, everything will be fine. They end up baffled why doing so doesn't fix the problem. FFOF is made at the factory to be the way you need it. You don't need to amend or add or mix with perlite. I guess that's the hard part, trusting the company to be right. Live and learn, I guess. My posts are turning into one big goddamn commercial for FFOF. but it's true, the soil works fine by itself.
Start seeds or cuts in light warrior, let it get about 10 inches tall, then transplant to FFOF. Just give water from the tap, no adjustment necessary.

I actually agree with you. I grow succulents, tomatoes, tons of different vegetables and house plants. Never have I heard of water PH being an issue, measuring PPM of runoff, or even utilizing liquid ferts until I started researching cannabis. I tried to follow the recommendations that I've seen, but it seems like a bunch of bro-science. I'll try just using FFOF soil and regular water on the next run. Using just soil and water has worked for all my other plants for...decades...so I don't know why I believed all this hype.

 

[Mrs. Weedstein]

I actually agree with you. I grow succulents, tomatoes, tons of different vegetables and house plants. Never have I heard of water PH being an issue, measuring PPM of runoff, or even utilizing liquid ferts until I started researching cannabis. I tried to follow the recommendations that I've seen, but it seems like a bunch of bro-science. I'll try just using FFOF soil and regular water on the next run. Using just soil and water has worked for all my other plants for...decades...so I don't know why I believed all this hype.

I think it’s a much bigger deal with hydroponics where you basically have no buffer for the roots.

 

[Aussieaceae]

I actually agree with you. I grow succulents, tomatoes, tons of different vegetables and house plants. Never have I heard of water PH being an issue, measuring PPM of runoff, or even utilizing liquid ferts until I started researching cannabis. I tried to follow the recommendations that I've seen, but it seems like a bunch of bro-science. I'll try just using FFOF soil and regular water on the next run. Using just soil and water has worked for all my other plants for...decades...so I don't know why I believed all this hype.

I'm definitely with you there. Grow it just the same way as you always have anything else. You won't find it any different.

Main thing to remember is cannabis really hates having wet feet. So there must be ample aeration + ample drainage.
It also loves nutrient rich media and lots of it.
(that's a reason hydro is so popular)

Have a good one. Cheers.

 

[myke]

I recall reading something here about peat if it gets too dry becomes
Hydrophobic ,the peat repels water and plants will almost turn yellow overnight. The fix is some tea but can’t remember which. Was interesting anyway.

 

[polishpollack]

Hydroponics is popular because it works 10 times faster than soil. Pumping air into water puts oxygen in greater abundance to the roots. When that happens, the plants grow like mad. This is why you should measure ppm or ec and pH, because there's a need to maintain a particular level of nutrients to the oxygen.
Roots need oxygen: As mentioned above, roots respire too! One of the functions of the substrate is to serve as a site for air exchange between the root zone and atmosphere. In other words, roots breathe oxygen like we do. Different plants have different oxygen requirements for their root systems.

 

[polishpollack]

I actually agree with you. I grow succulents, tomatoes, tons of different vegetables and house plants. Never have I heard of water PH being an issue, measuring PPM of runoff, or even utilizing liquid ferts until I started researching cannabis. I tried to follow the recommendations that I've seen, but it seems like a bunch of bro-science. I'll try just using FFOF soil and regular water on the next run. Using just soil and water has worked for all my other plants for...decades...so I don't know why I believed all this hype.

You didn't know the difference yet. All the hype actually sounds good; people make it sound so convincing. They don't understand that they are wrong. This has been going on for years. The grow shops make money based on this ignorance. This website thrives on these ongoing, nonsense conversations that people are into, and the more the hype, the more the people, and the more the people, the more the advertising money. In the end, it's all about money. Who cares if the info is accurate. On Wall Street, there's the idea of pursuing "dumb money." It's always easy.

 

[Mrs. Weedstein]

You didn't know the difference yet. All the hype actually sounds good; people make it sound so convincing. They don't understand that they are wrong. This has been going on for years. The grow shops make money based on this ignorance. This website thrives on these ongoing, nonsense conversations that people are into, and the more the hype, the more the people, and the more the people, the more the advertising money. In the end, it's all about money. Who cares if the info is accurate. On Wall Street, there's the idea of pursuing "dumb money." It's always easy.

Hydroponics is popular because it works 10 times faster than soil. Pumping air into water puts oxygen in greater abundance to the roots. When that happens, the plants grow like mad. This is why you should measure ppm or ec and pH, because there's a need to maintain a particular level of nutrients to the oxygen.
Roots need oxygen: As mentioned above, roots respire too! One of the functions of the substrate is to serve as a site for air exchange between the root zone and atmosphere. In other words, roots breathe oxygen like we do. Different plants have different oxygen requirements for their root systems.

I don’t have anything against hydroponics but I know it’s not for me. I get such heavy yields outdoors that I end up giving most of my weed away, so the prospect of faster growth and more weed isn’t much of an incentive.

Measuring the pH of the water when you’re growing in soil may provide a benefit if your water is seriously out of whack, but when I’m watering an acre of other plants and they’re doing fine, I am not going to bother for cannabis — especially since 7-8 foot tall plants consume huge amounts of water.

I’d be doing nothing else but measuring pH all day, LOL! All this is my way of saying is I prefer low-input cannabis production, and I think it’s probably more approachable for beginners.

 

[polishpollack]

And growing under the sun doesn't hurt either.