Help, yellowing and spots spreading

C

CaptainAdrock

Member
Ok so autoflower, week 5 of flower, day 77. DWC using expanded clay pellets. 2 1000w leds. Temp 77F. Humidity ~50%. 20/4 cycle. Using gh flora series. Micro 5.3ml/gal, gro 5.3, bloom 7.6. Following recommeneded feed schedule. I noticed the problem and asked on here once and the consensus was a manganese deficiency. I started adding 3ml/gal of cal mag plus, which we thought would solve the problem. However it seems to be spreading to the leaves around the budding sites now. First grow, any help would be greatly appreciated
 

Attachments

Johiem

Johiem

Well-Known Member
First, damaged leaves will not repair themselves, the damage is done. Look to your new growth for improvement.
Second, If it is a manganese(Mn) deficiency cal-mag won't help. That's calcium(Ca) and magnesium(Mg), and maybe some nitrogen depending on the supplier and recipe. Not sure on how to add manganese, it's in your micro.
 
go go kid

go go kid

Well-Known Member
Treatment. Manganese deficiency is controlled by using manganese sulphate (MnSO4 . 7H2O) as a soil applicant or a foliage spray. Chelated forms of manganese can also be used as a foliar spray although this treatment is more expensive.
i dont know at what rate to apply it though, that will have to come from instructions on the chelated packet or someone on here may be familiar twith the sulphate
 
C

CaptainAdrock

Member
Johiem said:
First, damaged leaves will not repair themselves, the damage is done. Look to your new growth for improvement.
Second, If it is a manganese(Mn) deficiency cal-mag won't help. That's calcium(Ca) and magnesium(Mg), and maybe some nitrogen depending on the supplier and recipe. Not sure on how to add manganese, it's in your micro.
Click to expand...
Should I just increase the amount of micro in my soup?
 
Johiem

Johiem

Well-Known Member
CaptainAdrock said:
Should I just increase the amount of micro in my soup?
Click to expand...
Maybe a foliar treatment with some "transport" from optic foliar. I'd be afraid of lockout if you just add more micro. The transport is just a leaf penetrant and carrier.
OOOH! Manganese sulfate, some sort of seaweed or kelp, and transport, puts the manganese right into the leaves and the kelp has a little nutrition and like 70 bio stimulants, good shit.
 
C

CaptainAdrock

Member
Johiem said:
Maybe a foliar treatment with some "transport" from optic foliar. I'd be afraid of lockout if you just add more micro. The transport is just a leaf penetrant and carrier.
OOOH! Manganese sulfate, some sort of seaweed or kelp, and transport, puts the manganese right into the leaves and the kelp has a little nutrition and like 70 bio stimulants, good shit.
Click to expand...
Not sure how I would add seaweed...might have to buy some liquid manganese suppliment
 
C

CaptainAdrock

Member
Johiem said:
Maybe a foliar treatment with some "transport" from optic foliar. I'd be afraid of lockout if you just add more micro. The transport is just a leaf penetrant and carrier.
OOOH! Manganese sulfate, some sort of seaweed or kelp, and transport, puts the manganese right into the leaves and the kelp has a little nutrition and like 70 bio stimulants, good shit.
Click to expand...
Is it possible this a lockout issue already?
 
Johiem

Johiem

Well-Known Member
I wouldn't think so at those concentrations. All sorts of kelp and seaweed out there, I use posidonzime(sp) from nectar for the gods. Just Google kelp foliar spray.
 
xtsho

xtsho

Well-Known Member
I doubt you have a manganese deficiency. What's the pH and EC. How often are you dumping the bucket or have you just been topping it off?
 
T

TheWholeTruth

Well-Known Member
They look pretty pale on the pictures, are you sure you haven't locked them out. I would run them through some clean ph'd water with some stress reliever on a very very low dose of feed. Then build your feed
strengths back up bit by bit.
Edit.. looking at it more closely. That is just 1 plant that has the issue or is it 2 ? Not too sure but from the pictures it looks as if the paleness it mostly in the uper half of the plant. Have you checked your roots for any signs of rot ?
 
Last edited:
C

CaptainAdrock

Member
TheWholeTruth said:
They look pretty pale on the pictures, are you sure you haven't locked them out. I would run them through some clean ph'd water with some stress reliever on a very very low dose of feed. Then build your feed
strengths back up bit by bit.
Edit.. looking at it more closely. That is just 1 plant that has the issue or is it 2 ? Not too sure but from the pictures it looks as if the paleness it mostly in the uper half of the plant. Have you checked your roots for any signs of rot ?
Click to expand...
Just one plant. I'll post a picture if the roots when I get back home. They root structure looks good though from what I can tell. Upper part of the plant shows the most. Got some leaves dying and falling off on the bottom but I was told to expect that some when flowering.
 
You must log in or register to reply here.
Top