why are my leaves falling

Your humidity and temps are good.


What is the EC or PPM of the nutrient solution you are feeding them?

Roy1212 said:

I have the same issue i just switched the lighting cycle to 12/12 to flowering stage (4th day now) , but today i noticed that 6 leaves from the bottom has fallen with light greenish color after just touching it , and the top of the plant is fine. I'm looking forward to know why and the cause... Here is a pic..

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To the OP and Roy1212,

My thoughts are low in nitrogen and low in Magnesium.

Was your plant pale green in your veg?

Did you switch to a flowering Food the day you switched the photoperiod?

I use the exact same food I veg with during the first week or two of flowering depending on strain.


Do you have a Veg photo of the plant?

Are any leaf stems looking purple?

Bless,
DZ

low nitrogen levels cause for weak stems. causing them to snap from the main stalk realy easy.
That and bad air circulation will make your plants realy realy weak.
tbh, we have no real numbers to work with so. buy a ph meter, and tell us more about your feeding schedule

See this picture it looks like something like dust on the leaves this is new issue don't know why? Can you help me? And regarding the lower leaves is still falling and im afraid to lose all the leaves. in addition i have this annoying flying grants coming out from the soil..

NinjaToke said:

Is everyone here sure the problem is the fans? I mean Ive got the same exact problem, healthy green leaves go limp and fall off. Temps, PH, PPM, air circulation all good and its only 1plant too.

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No I'm not sure lol. Don't think it's the fan thing.

I'm not in soil but I had same issues, well lots of different things actually and trying to figure it out here was super confusing. I finally read a thread from an old guy (like me lol) that suggested using an amino acid supplement and it actually made a huge difference in plant health, you may also be so infested with gnats that they are effecting the root system. My theory (and just that lol) is the amino supplement is helping me with nutrient uptake.

Also you may want to ditch the MG and try something different.

Thanks for the tip though, but how can i get the amino supplement? As in my current staying place doesn't have much imported products, plus what is the cause of this deficiency

Roy1212 said:

Thanks for the tip though, but how can i get the amino supplement? As in my current staying place doesn't have much imported products, plus what is the cause of this deficiency

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Well I use Vitanimo (not endorsing it) and I'm in hydro so may be different but I suspect I had numerous issues with nute uptake

Hopefully experienced soil guys will show up. Like I said its gonna get confusing like the fan thing .

Yeah thanks anyway you did your best and good luck with your growing.

Is there any one else could help us over here?

Try the plant problem section and post there.

Here is one link to a page that discusses all sorts of plant problems and deficiencies and explains them and has lots of examples in pictures. Its very helpful for anyone looking for a all in one site.
https://www.icmag.com/ic/showthread.php?t=231387

Just spent an hour trying to look up your problem Roy1212. Maybe take a look at that link i provided. I know i book marked it for my future reference. Good Luck.

Ok i will..thanks.
By the way i found these creatures in the electronic trap i think they are reason for this

Its a great link rich of knowledge Thanks dude.

Roy1212 said:

Ok i will..thanks.
By the way i found these creatures in the electronic trap i think they are reason for this

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Well yuk lol,

Either way you still need a fan blowing on the plants. One grow I thought the night time temps were too low so I quit using a fan during darkness. When I harvested the one plant (that was late) I noticed my first round of powdery mildew. My RH (humidity) is between 20% and 22% but usually 20% solid. I'll never turn off my fan again.

I want a picture of the whole plant. Not just a cpl of leaves! Tells me nothing!

MG and the one you have 16-16-16 is most of the problem.....
MG is formulated to screw with cannabis - actually the maker admitted it in a press report after they bought G&H!

Your ratio for NPK is off and you'll need a good source of micro nutes, plant hormones and B-vits.....GO directly to a Kelp extract and add that at 5ml with every feeding....

When your done with this run, DITCH the MG!

Here you go. Pictures for the whole plant