Septoria or calmag deficiency or fungus ?

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Youngnobleoulaw

Member
I have 6 blueberry indica clones . They are growing in bat mix .I am feeding them on canna nutrients a+b, pk13/14 and canna boost once a week . I give them water inbetween ph 6 6.5 .
I am using a 2 x marshydro sp3000 on 75 percent power. about 22 inches above canopy.
My grow room is 3x5ft. I have a 4inch exhaust fan and a 16inch ocsilating fan. The temps are 25 to 27 during lights on and between 17 and 19 during lights off. Humidity 60 to 65 ..
They in the 4th week of flower . I have checked the ph on the run off after watering and it' comes back at 6.5.
I have give them calmag once a week since watering (0.5ml per liter)
This week they have developed tiny brown spots on the fan leaves and also on some of the sugar leaves The spots are more to the tips of the fan leaves and some leaves are going yellow . All the 4 plants have the same problem.
I have been trying to find out if it's yellow leave septoria or calmag deficiency. Or any kind of fungus due to high humidity or too much light .
if it is septoria can I use anything to stop the spread which wont hurt the buds .
Also this is my first grow .Do they look ok for 4 week flower .

Thanks in advance
 

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Y

Youngnobleoulaw

Member
Herb & Suds said:
Your plants don't appear anything but healthy
I doubt that even if it is fungal at this point it will affect your yields or quality
Nice work
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Thanks for the vote of confidence h&b . I just don't understand why these brown spots have appeared or what they could be . I have taken all the leaves off which had these brown spots. I am worried as I have seen some on the sugar leaves at the top of the canopy.
Thanks again
 
Millo

Millo

Well-Known Member
Hey man, this really looks quite unique. Looks like a mix of cal def + septoria, as you said, but at the same time it looks like something completly different. Quite peculiar.
Anyways the ladies look pretty darn good. I wouldn't worry too much about it at this point. Just give them lots of love for the time remaining and you should be good! :peace: :leaf:
 
Y

Youngnobleoulaw

Member
Millo said:
Hey man, this really looks quite unique. Looks like a mix of cal def + septoria, as you said, but at the same time it looks like something completly different. Quite peculiar.
Anyways the ladies look pretty darn good. I wouldn't worry too much about it at this point. Just give them lots of love for the time remaining and you should be good! :peace: :leaf:
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If it is cal mag deficiency how do I unlock it from the soil as they have already been receiving it on a weekly basis .
Then the issue of septoria what can I use in flower
Thanks again
 
Nutty sKunK

Nutty sKunK

Well-Known Member
Youngnobleoulaw said:
I have 6 blueberry indica clones . They are growing in bat mix .I am feeding them on canna nutrients a+b, pk13/14 and canna boost once a week . I give them water inbetween ph 6 6.5 .
I am using a 2 x marshydro sp3000 on 75 percent power. about 22 inches above canopy.
My grow room is 3x5ft. I have a 4inch exhaust fan and a 16inch ocsilating fan. The temps are 25 to 27 during lights on and between 17 and 19 during lights off. Humidity 60 to 65 ..
They in the 4th week of flower . I have checked the ph on the run off after watering and it' comes back at 6.5.
I have give them calmag once a week since watering (0.5ml per liter)
This week they have developed tiny brown spots on the fan leaves and also on some of the sugar leaves The spots are more to the tips of the fan leaves and some leaves are going yellow . All the 4 plants have the same problem.
I have been trying to find out if it's yellow leave septoria or calmag deficiency. Or any kind of fungus due to high humidity or too much light .
if it is septoria can I use anything to stop the spread which wont hurt the buds .
Also this is my first grow .Do they look ok for 4 week flower .

Thanks in advance
Click to expand...
Funny timing - I’m experiencing the same issue and I figured out what and why the yellow has occurred? Pictures look familiar? Yellowing middle of plant with little rust spots? The rust spots are hard to see in the photo but they are there.

Manganese deficiency. Most likely caused by the calmag. Does your calmag contain iron? Most do. Iron antagonises manganese and therefore u need to supply more of it.

Your water might contain high iron too which might explain why the calmag threw the balance off - find a water report if possible.

Good luck.
FE59E45A-1B6A-4C7E-AC6F-E3FB8985CDB3.jpegB13CC31B-809B-4922-BDD5-5C57D00774AC.jpeg
 
Y

Youngnobleoulaw

Member
Nutty sKunK said:
Funny timing - I’m experiencing the same issue and I figured out what and why the yellow has occurred? Pictures look familiar? Yellowing middle of plant with little rust spots? The rust spots are hard to see in the photo but they are there.

Manganese deficiency. Most likely caused by the calmag. Does your calmag contain iron? Most do. Iron antagonises manganese and therefore u need to supply more of it.

Your water might contain high iron too which might explain why the calmag threw the balance off - find a water report if possible.

Good luck.
View attachment 4739044View attachment 4739042
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Thanks for the update . I flushed them on Sunday with 10 litres of water each just to make sure there is no salts building up hindering the uptake of any nutes. I will start feeding them again end of the week when the soil has dryed up .
Yours do look awesome how many weeks are u in flower ?
 
Nutty sKunK

Nutty sKunK

Well-Known Member
Youngnobleoulaw said:
Thanks for the update . I flushed them on Sunday with 10 litres of water each just to make sure there is no salts building up hindering the uptake of any nutes. I will start feeding them again end of the week when the soil has dryed up .
Yours do look awesome how many weeks are u in flower ?
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Hopefully they don’t yellow out too much for you. When flushing its best to give them a feed on the last watering - the amount you’d usually give them volume wise. Just to get some balance back in the soil.

Thanks dude they are autos and are 8 weeks since popping the soil and 5 weeks into flowering. This one easily has another 3-4 weeks left as she’s high in sativa.
 
Y

Youngnobleoulaw

Member
Nutty sKunK said:
Hopefully they don’t yellow out too much for you. When flushing its best to give them a feed on the last watering - the amount you’d usually give them volume wise. Just to get some balance back in the soil.

Thanks dude they are autos and are 8 weeks since popping the soil and 5 weeks into flowering. This one easily has another 3-4 weeks left as she’s high in sativa.
Click to expand...
They do look brill .
 
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