Yellow leaves from top down

MustGro

MustGro

Well-Known Member
slipdef said:
Thanks for the precisions
yes they look hungry, but i doubt add nitrogen will change anything at this point, plus if u feed them with organics with slow diffusion.
trying to face the yellowing in adding Amounts of nitrogen now looks risky because the plants won't metabolise it and you'll end up with green smoke buds :(
Probably sure they need some but imo u won't counter it
But the yellowing start from the top, that's a bit strange for a Nitrogen deficiency, there is something else, don't know but the fact u regulate pH level doesn't help,
imo you get more chance to get problems when u try to regulate than if u don't worry about it
u don't need use it unless u're running soil in very small pots in a DTW, with multi run off per day schedule...

Sorry my comment doesn't help much for your current problem... i think you can't really go back

Next time, make sure your mix contain enough food (especially N) to endure the stretch or feed them copiously during this phase to prevent any premature yellowing.

That said, at least they're not overfeed ^^
Good luck!
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This is also not good advice.
Adding a good dose of N will change your plants. They might not get green, but they’ll stop yellowing and they will avoid lower leaf drop. He’s wrong about your plants not metabolizing nitrogen at this point. The rest is just hard to understand.
 
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slipdef

slipdef

Well-Known Member
MustGro said:
This is also not good advice.
Adding a good dose of N will change your plants. They might not get green, but they’ll stop yellowing and they will avoid lower leaf drop. He’s wrong about your plants not metabolizing nitrogen at this point. The rest is just hard to understand.
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hard to understand? i'm french and u all probably know about how bad in english we are xD sorry about that.
i agree that adding will change the plants but they need a lot of N to possibly recover, i doubt he could get rid of it in the final smoke
 
Father Earth

Father Earth

Well-Known Member
You're still in mid flower. Your plant needs that nitrogen because you didn't give it to them earlier. You seem to have another deficiency as well hopefully the nitrogen will clear it up.
 
MustGro

MustGro

Well-Known Member
slipdef said:
hard to understand? i'm french and u all probably know about how bad in english we are xD sorry about that.
i agree that adding will change the plants but they need a lot of N to possibly recover, i doubt he could get rid of it in the final smoke
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Yeah lots of people on here don’t speak English as their first language, and that’s great with me, but hard to find the meaning in some of the posts on here sometimes.
I agree that N is hard to get out of the bud, but lots of folks on here run a long flower for a reason, better buds. If the OP keeps on low feeding, the buds will still finish, but they won’t really fill out. If the feeds in general, and especially N are increased, the buds should fill in a lot more than they have. It doesn’t have to run at max all the way out of flower. If the plant is run out a bit longer, it’ll need way less fert in the last stages and will use up what it has stored.
 
myke

myke

Well-Known Member
Seems low on N as said already,stretch consume a lot of it and can be hard to keep it up.Top dressing more frequent with smaller amounts helps.The good thing about N is your soil microbes and the decomposition process will make use of the extra nitrogen so adding to much isnt such a bad thing.Too much P and K is more troublesome.
A good rule is to keep feeding veg nutes until stretch is done ,most contain enough NPK to get you to harvest providing the percentages arnt too high.
 
sierra_indoors

sierra_indoors

Member
I mean you think there's no such thing as cal and magnesium deficiency you must be a different level of retarded so imma quit wasting my time with someone who nicknames them self after a fast food joint
 
xtsho

xtsho

Well-Known Member
That plant is hungry. Feed it some base nutrients. Those will contain all the calcium and magnesium needed along with the other nutrients it needs. Calmag is so overused it's become ridiculous. It also causes problems with many new growers that have read so many people saying "Needs Calmag" that they start using it from day one with every watering because they think it's a damn requirement or some special elixir. Unless you're using RO water you shouldn't need any Calmag supplement ever. Too much calcium will cause problems with the uptake of other nutrients.
 
Nutty sKunK

Nutty sKunK

Well-Known Member
@ OP

The reason it’s yellowing top down is that those leaves are doing most of the photosynthesis.

If there’s not enough N present the leaves will yellow not only from the bottom but also the top (especially the fan leaves)…

It’s a common occurrence indoors under intense lighting. Not so much outdoors
 
H

Havoc2408

Member
slipdef said:
Thanks for the precisions
yes they look hungry, but i doubt add nitrogen will change anything at this point, plus if u feed them with organics with slow diffusion.
trying to face the yellowing in adding Amounts of nitrogen now looks risky because the plants won't metabolise it and you'll end up with green smoke buds :(
Probably sure they need some but imo u won't counter it
But the yellowing start from the top, that's a bit strange for a Nitrogen deficiency, there is something else, don't know but the fact u regulate pH level doesn't help,
imo you get more chance to get problems when u try to regulate than if u don't worry about it
u don't need use it unless u're running soil in very small pots in a DTW, with multi run off per day schedule...

Sorry my comment doesn't help much for your current problem... i think you can't really go back

Next time, make sure your mix contain enough food (especially N) to endure the stretch or feed them copiously during this phase to prevent any premature yellowing.

That said, at least they're not overfeed ^^
Good luck!
Click to expand...
MustGro said:
Yeah lots of people on here don’t speak English as their first language, and that’s great with me, but hard to find the meaning in some of the posts on here sometimes.
I agree that N is hard to get out of the bud, but lots of folks on here run a long flower for a reason, better buds. If the OP keeps on low feeding, the buds will still finish, but they won’t really fill out. If the feeds in general, and especially N are increased, the buds should fill in a lot more than they have. It doesn’t have to run at max all the way out of flower. If the plant is run out a bit longer, it’ll need way less fert in the last stages and will use up what it has stored.
Click to expand...
I fed at full strength the same night I asked for advice and just waiting for it to dry out. I guess it is what it is.
xtsho said:
That plant is hungry. Feed it some base nutrients. Those will contain all the calcium and magnesium needed along with the other nutrients it needs. Calmag is so overused it's become ridiculous. It also causes problems with many new growers that have read so many people saying "Needs Calmag" that they start using it from day one with every watering because they think it's a damn requirement or some special elixir. Unless you're using RO water you shouldn't need any Calmag supplement ever. Too much calcium will cause problems with the uptake of other nutrients.
Click to expand...
MustGro said:
This is not good advice. Your plants are lime green to yellow in color. Adding a small amount of N will not stop your problem. Now is the time to hit them hard or they will continue to be deficient. The next stage is lower leaf drop. I would feed at full strength with a good liquid fert, let them dry out and then fert them the same way again.
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K, I gave here a full strength and she seems to like it. Probably few more days till she drys out. So I don't have to worry about harsh smoke?
 
MustGro

MustGro

Well-Known Member
Havoc2408 said:
K, I gave here a full strength and she seems to like it. Probably few more days till she drys out. So I don't have to worry about harsh smoke?
Click to expand...
So lots of folks on here fert right up to harvest and like the final product. Feeding to the end helps the plant make bud mass BUT, like you are concerned about, a bunch of elements left in the pot isn’t the best for taste. Many folks on here run long flower times too; that gives you a big window for letting the plant use up the available nutrients.
Realistically how long are you going to flower for? Me personally, I’d fert them real good this next week or two, get them happy, then start backing down the dose as they ripened. You could run on just water the last week or more if you were concerned about harshness.
 
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