need help!

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SmokeandFly123

Member
hi all,

so this is my first grow. i am growing in biobizz light mix soil while using biobizz nutrients.
i am growing 3 autoflower plants and around day 30 i started to get some lower leaves turn yellow.
after some reading and comparing pictures online i thought i might have a nitrogen deficiency.
so increased nutrients but problem quickly started to get worse, with leaves turning yellow and wilting fast... plus spreading up the plant.
so....done some more googling and thought maybe magnesium deficiency.
this is some pics taken today on day 41.
any ideas?
help appreciated
 

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S

SmokeandFly123

Member
i actually bought calmag today, does the same job as epsom salts?
i am using 1200w LEDs.
wouldn’t light burn effect top leaves closest to light?
the top leaves are the least effected and i can’t really see any light burn but i have had consistent temps of around 30c-32c since turning on full spectrum
 
JordanZz

JordanZz

Active Member
SmokeandFly123 said:
i actually bought calmag today, does the same job as epsom salts?
i am using 1200w LEDs.
wouldn’t light burn effect top leaves closest to light?
the top leaves are the least effected and i can’t really see any light burn but i have had consistent temps of around 30c-32c since turning on full spectrum
Click to expand...
30/32c a little high maybe? I grow between 20/26c and seems to be okay
 
FastFreddi

FastFreddi

Well-Known Member
SmokeandFly123 said:
i actually bought calmag today, does the same job as epsom salts?
i am using 1200w LEDs.
wouldn’t light burn effect top leaves closest to light?
the top leaves are the least effected and i can’t really see any light burn but i have had consistent temps of around 30c-32c since turning on full spectrum
Click to expand...
Are you ph -ing anything? You may have caused a lockout.
Looks to be the start of magnesium issues...Temps at lights off near root zone?
I suspect a ph problem.
FF
 
FastFreddi

FastFreddi

Well-Known Member
FastFreddi said:
Are you ph -ing anything? You may have caused a lockout.
Looks to be the start of magnesium issues...Temps at lights off near root zone?
I suspect a ph problem.
FF
Click to expand...
SmokeandFly123 said:
i actually bought calmag today, does the same job as epsom salts?
i am using 1200w LEDs.
wouldn’t light burn effect top leaves closest to light?
the top leaves are the least effected and i can’t really see any light burn but i have had consistent temps of around 30c-32c since turning on full spectrum
Click to expand...
Too many are automatically dumping calmag....usually only required with ro water.
FF
 
kodak91

kodak91

Active Member
Its not uncommon to biobizz soil to run out of calcium and magnesium after 4 weeks. Your tapwater might be very soft.

What is the ph that you are feeding your plant with? You might be locking out calmag.
 
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SmokeandFly123

Member
FastFreddi said:
Are you ph -ing anything? You may have caused a lockout.
Looks to be the start of magnesium issues...Temps at lights off near root zone?
I suspect a ph problem.
FF
Click to expand...
lots of different opinions on the ph-ing with organic soil so i haven’t checked ph once.
if i remember correctly i think the water in my area is around the 200ppm mark.
i don’t let the water sit for 24 hours like some ppl do, is this a mistake?
 
S

SmokeandFly123

Member
JordanZz said:
You could increase airflow and extraction to try and cool it down a bit
Click to expand...
i have two 6 inch oscillating fans, passive intake with more than a good enough extraction fan causing negative pressure.
prob is i got my tent in a cupboard under the stairs for stealth, and i can open door at certain times but the heat builds up.
 
FastFreddi

FastFreddi

Well-Known Member
SmokeandFly123 said:
lots of different opinions on the ph-ing with organic soil so i haven’t checked ph once.
if i remember correctly i think the water in my area is around the 200ppm mark.
i don’t let the water sit for 24 hours like some ppl do, is this a mistake?
Click to expand...
I don't either...no problems for me with chloramines at all.
FF
 
kodak91

kodak91

Active Member
SmokeandFly123 said:
lots of different opinions on the ph-ing with organic soil so i haven’t checked ph once.
if i remember correctly i think the water in my area is around the 200ppm mark.
i don’t let the water sit for 24 hours like some ppl do, is this a mistake?
Click to expand...
Lots of missinformartion yes. But you do need to check PH. You are not growing organic, mate. Buying and using organic products like biobizz doesnt mean you are growing "organic". You are still feeding the plant through bottled nutes so you should ALWAYS check and adjust the PH. With biobizz if you water with a higher PH then needed, the microorganisms will act as PH down and adjust to the 6.2-6.8 range. BUT if you feed your plant with less then 6.2ph, the microorganisms cant PH up, so you are locking out nutrients. Cal and Mag are best absorbed in soil at 6.5ph.
 
Last edited:
T

Trippybean

Member
SmokeandFly123 said:
hi all,

so this is my first grow. i am growing in biobizz light mix soil while using biobizz nutrients.
i am growing 3 autoflower plants and around day 30 i started to get some lower leaves turn yellow.
after some reading and comparing pictures online i thought i might have a nitrogen deficiency.
so increased nutrients but problem quickly started to get worse, with leaves turning yellow and wilting fast... plus spreading up the plant.
so....done some more googling and thought maybe magnesium deficiency.
this is some pics taken today on day 41.
any ideas?
help appreciated
Click to expand...
My first grow as well a couple of my GG4 autos did the same thing i think it was a ph issue cause I adjusted it and now its fixed i wish u luck
 
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