Can any pros identify what's up with these ?

I grow small only two at time with cfls , auto flowers fast and vast, biobizz light mix soil ,big one is 37 days old smaller is 23 days old, thanks for any feed back

I'm literally having the same issue as this. I'm not a pro or anything, but I'm guessing it's either a nitrogen or magnesium deficiency.

Nute burn and getting lockout/deficiencies from being over fed.

Magnesium def

Flush with 3 times volume of pots with a light nutrient solution pH the solution and proceed to flush wait a few days they will come back

Chrissa said:

Flush with 3 times volume of pots with a light nutrient solution pH the solution and proceed to flush wait a few days they will come back

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Awesome thank you

R1b3n4 said:

Magnesium def
View attachment 3587940

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Thanks your correct, this will come in handy in the future

you need cal mag! simple fix

getdown76 said:

you need cal mag! simple fix

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Any recommendation of brand ?

honestly, cal mag is cal mag. doesnt matter what brand it is. epsom salt is good too.

pH your water. Low pH in the root zone cause magnesium uptake problems. Do not flush with any 3X the volume of anything. That is a fool's errand. Make them short on magnesium and then drown the bitches.

hotrodharley said:

pH your water. Low pH in the root zone cause magnesium uptake problems. Do not flush with any 3X the volume of anything. That is a fool's errand. Make them short on magnesium and then drown the bitches.

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Hahah how much is "drown the bitches" though bro?

condogg said:

Hahah how much is "drown the bitches" though bro?

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http://bigbudsmag.com/when-to-flush-your-marijuana-crop/

It's always a controversy on flushing. Yes flush. No on the 3X - 5X container volume.

"Yet another problem happens if you use too much water and oversaturate the root zone. Marijuana plants don’t like their roots drowned. It starves them of oxygen and sets them up for rot."

The goal is for the water to displace other materials already in the plant tissue. It works and makes bud taste and burn better. But nothing says you should drown the bitch. Just water with, well, with water! No nutes the last 10 days unless the plant shows a marked deficit.