Brown spots on leaves

[Fifino999]

Hi everyone, one of my automatic girls has her leaves full of spots, this starts 3 weeks ago on the lowest foliage.
The people I question tells me that is a deficiency, but I don´t know of what.
In first pleace I thought that was a fungus and I cut the most affected leaves.



I thanks any help, this is my first grow.

P.S: Sorry if my English isn´t too good.

 

[Chimera]

Most likely the pH of your soil is too low, and it is locking out Magnesium & Calcium.

Water with pH 7 water & catch the runoff then measure the pH- almost certain it is below 5.8.

If you are not using a pH meter or measuring pH with indicator drops / litmus paper, you are not able to control perhaps the most important factor to control while growing.

Hope that helps,
-Chimera

 

[Teddybrae]

Looks to me like yr plant has reached the end of its life. The big leaves are giving up their nutrients to the flowers and will soon drop off. This is quite normal especially with Sativa Dominant varieties. This slow dying is called 'Senescence'.


Also looks to me like you've done a good job of growing this plant!

 

[therevverend]

It shouldn't be entering senescence at this stage in it's life, it's covered in white hairs and receptive to pollination. The necrosis on the leaves is the give away, a senescent plant wouldn't develop that. The leaves aren't a normal yellow, they're a sickly yellow-green.

I agree with Chimera, check the PH. Fairly certain it's not fungal. The necrosis is inter-veinal, spreading from the veins into the leaves. Sure sign of Magnesium deficiency. The sickly yellow-green color is calcium. I'm guessing your soil isn't deficient to that degree, to cause that big of a response. Mag and Cal are prone to lockout, once they get locked up the N gets locked up. PH lock up it is!

Might not hurt to give them a dose of epsom salts, a tsp per gallon. If the plant was young, in Veg, you could transplant into better soil. As is your're kind of stuck until the end. Transplanting at this stage wouldn't help. There's lots of things you can add that will raise your PH. Don't assume it's PH, test first. Then treat it, I'll let you do the search as to what to use to fix it.

 

[I'mback]

Hi everyone, one of my automatic girls has her leaves full of spots, this starts 3 weeks ago on the lowest foliage.
The people I question tells me that is a deficiency, but I don´t know of what.
In first pleace I thought that was a fungus and I cut the most affected leaves.



I thanks any help, this is my first grow.

P.S: Sorry if my English isn´t too good.

How old is the plant?

 

[Fifino999]

Most likely the pH of your soil is too low, and it is locking out Magnesium & Calcium.

Water with pH 7 water & catch the runoff then measure the pH- almost certain it is below 5.8.

If you are not using a pH meter or measuring pH with indicator drops / litmus paper, you are not able to control perhaps the most important factor to control while growing.

Hope that helps,
-Chimera

I think you are right, i dont check the Ph of the soil.

Thanks for your answer! It is very helpful

 

[Fifino999]

It shouldn't be entering senescence at this stage in it's life, it's covered in white hairs and receptive to pollination. The necrosis on the leaves is the give away, a senescent plant wouldn't develop that. The leaves aren't a normal yellow, they're a sickly yellow-green.

I agree with Chimera, check the PH. Fairly certain it's not fungal. The necrosis is inter-veinal, spreading from the veins into the leaves. Sure sign of Magnesium deficiency. The sickly yellow-green color is calcium. I'm guessing your soil isn't deficient to that degree, to cause that big of a response. Mag and Cal are prone to lockout, once they get locked up the N gets locked up. PH lock up it is!

Might not hurt to give them a dose of epsom salts, a tsp per gallon. If the plant was young, in Veg, you could transplant into better soil. As is your're kind of stuck until the end. Transplanting at this stage wouldn't help. There's lots of things you can add that will raise your PH. Don't assume it's PH, test first. Then treat it, I'll let you do the search as to what to use to fix it.

Thanks so much for your answer! It is very helpful.
I'll do what you told me, after I check the Ph of the soil and the water.

 

[Fifino999]

How old is the plant?

The plant is in its ninth week of life, and its fivest week of flowering.

 

[Fifino999]

Looks to me like yr plant has reached the end of its life. The big leaves are giving up their nutrients to the flowers and will soon drop off. This is quite normal especially with Sativa Dominant varieties. This slow dying is called 'Senescence'.


Also looks to me like you've done a good job of growing this plant!

Thanks for your answer!

 

[I'mback]

The plant is in its ninth week of life, and its fivest week of flowering.

Well considering that autos run for 8 weeks, I'd have tosay she is finished

 

[99problems]

Well considering that autos run for 8 weeks, I'd have tosay she is finished

Just like with photoperiods, different strains different flowering times and as you can see on the picture he provided it is not ready yet!

I'd also say it's pH related, probably on the low side.

 

[Fifino999]

Well considering that autos run for 8 weeks, I'd have tosay she is finished

According to the bank information, 3 weeks are left at least.