Do yellow leaves still photosynthesise?

[MrGreenfinga]

I have had a little nitrogen deficiency and bottom leaves was yellowing

Do they still absorb light and work like leaves or should i just pick them off

I am in week 2 flower

Another question is why does my leaves have these small white spots looks a bit like calcium spots

I have had really high humidity in some nights so maybe it could be water from humid air just seems wierd doesnt look anything like mildew either

 

[climbit]

Do they rub off? The spots?

 

[MrGreenfinga]

Do they rub off? The spots?

Yep if i just lick my thumb and rub them a bit theyre gone

 

[LoveGrowingIt]

I have had a little nitrogen deficiency and bottom leaves was yellowing

Do they still absorb light and work like leaves or should i just pick them off

No. They don't and can be removed.

 

[Zill]

Pull the yellow leaves. At that point they are actually parasitic to the plant.

 

[MrGreenfinga]

Pull the yellow leaves. At that point they are actually parasitic to the plant.

Parasitic meaning they just suck energy and dont give any back?

 

[Zill]

Yup. They take up water and nuts, transpire the water and nuts just sit there. The mobile nutrients like N2 will be moved to the actively shoots, meristems. And those yellow leaves support fungal growth.

 

[Gtglicky3]

I have had a little nitrogen deficiency and bottom leaves was yellowing

Do they still absorb light and work like leaves or should i just pick them off

I am in week 2 flower
View attachment 2118673
Another question is why does my leaves have these small white spots looks a bit like calcium spots

I have had really high humidity in some nights so maybe it could be water from humid air just seems wierd doesnt look anything like mildew either
View attachment 2118674View attachment 2118675View attachment 2118676View attachment 2118681

Those spots are from the leaves sweating possibly from overwatering it’s pulling to much water up into the plant at night so I come out in the leaf that could also be the problem.
How often do you water? And are you feeding it anything?

 

[Zill]

Parasite - I take and give nothing beneficial back.

 

[MrGreenfinga]

Those spots are from the leaves sweating possibly from overwatering it’s pulling to much water up into the plant at night so I come out in the leaf that could also be the problem.
How often do you water? And are you feeding it anything?

Im feeding at an ec of 1500
And give it 33% of the pot volume
Until 10-15% runoff
Its about 3,5 liter (almost a gallon) in 11L pots (almost 3 gallon pots)
It does look a bit like sweating just looked at some pics
but again what can i do about it and is it any bad?

 

[Gtglicky3]

Im feeding at an ec of 1500
And give it 33% of the pot volume
Until 10-15% runoff
Its about 3,5 liter (almost a gallon) in 11L pots (almost 3 gallon pots)
It does look a bit like sweating just looked at some pics
but again what can i do about it and is it any bad?

Well it’s an early sign just got to narrow down what it could be sometimes switching to flower nutrients or bloom booster to abruptly can cause a nitrogen deficiency. Or a build up of nutrients in your medium. Overwatering can cause a deficiency also.
Do the leafs fall off easily when you touch them or do they still kinda hold on.
If it’s overwatering they will fall off real easy.
General rule of thumb is to let the top 1/2 inch of your medium to dry out before watering it’s also good to give them just plain water every so often to help brake down excess in the medium.

My suggestion would be to let it dry out and when you think it needs water I would wait an extra day or 2 then give it plain water.
An remove some of the yellowing leafs but not all at once you don’t want to stress it to much be selective then give it afew day before removing more

 

[MrGreenfinga]

Well it’s an early sign just got to narrow down what it could be sometimes switching to flower nutrients or bloom booster to abruptly can cause a nitrogen deficiency. Or a build up of nutrients in your medium. Overwatering can cause a deficiency also.
Do the leafs fall off easily when you touch them or do they still kinda hold on.
If it’s overwatering they will fall off real easy.
General rule of thumb is to let the top 1/2 inch of your medium to dry out before watering it’s also good to give them just plain water every so often to help brake down excess in the medium.

My suggestion would be to let it dry out and when you think it needs water I would wait an extra day or 2 then give it plain water.
An remove some of the yellowing leafs but not all at once you don’t want to stress it to much be selective then give it afew day before removing more

The nutrient level are on point
I just wasnt prepared for stretch
So i gave it too little nitrogen and the leaves started yellowing
Its not overwatering though plant drinks and drys out
I watered a week back with 1100EC
When i water last time with 1500EC
Runoff was at 1550EC
It drank it all so i think i just gave too little

The medium stays wet a about 4-5 days
A little too long for my liking
But im not risking underwatering during flower
And she seems to do fine

 

[kin88]

No. They don't and can be removed.

Hi there!

I had a little problem. Plants are on 4th week growing and look yellowish. They have been kind of like that since the begging.
I am growing on pure coco with canna nutes. The roots are already on the bottom of the pot. I don't know if I should transplant them to the 5gal fabric pots because they don't look that much healthy. I have some Great White to help on the transplant, but the question is, should I do it?
I don't know the reason why they look like that. Feeding at 1.1EC and 5.9ph.
Can you help me please?

 

[Newty]

Hi there!

I had a little problem. Plants are on 4th week growing and look yellowish. They have been kind of like that since the begging.
I am growing on pure coco with canna nutes. The roots are already on the bottom of the pot. I don't know if I should transplant them to the 5gal fabric pots because they don't look that much healthy. I have some Great White to help on the transplant, but the question is, should I do it?
I don't know the reason why they look like that. Feeding at 1.1EC and 5.9ph.
Can you help me please?

I would start a new thread for help.
Will get more attention that way and help faster.

 

[singlecoiled]

The nutrient level are on point
I just wasnt prepared for stretch
So i gave it too little nitrogen and the leaves started yellowing
Its not overwatering though plant drinks and drys out
I watered a week back with 1100EC
When i water last time with 1500EC
Runoff was at 1550EC
It drank it all so i think i just gave too little

The medium stays wet a about 4-5 days
A little too long for my liking
But im not risking underwatering during flower
And she seems to do fine

I use 3 gallon cloth pots and the most I water with is .5 gallons (much runoff)... If my soil stays wet for over 3 days, I cut it down to less than half a gallon.

1 gallon of water to 3 gallons of soil seems a bit much to me. 4-5 days seems a bit long to dry out as well.. All that water needs to go somewhere, and cloth pots can really crank the humidity levels...

There is a lot of variation in this hobby, but if I were you I'd cut down the water volume if possible. Out of curiosity, what soil are you using and are you using perlite?