Possible MG Def?

Hey guys i am growing some autoflowering chemdog and lemon skunks and one of them has brown and orange spots on the leaves with a few leaves curving ^ like they are praying is this mg if so how do i fix it?

Well pics would help. If it is mg deficiency then Epsom salts or Cal-Mag are what you need. Check the growFAQ: https://www.rollitup.org/view.php?pg=faq&cmd=category&id=33 for more info.


Edit: Taken from GrowFAQ:

" Magnesium
Chlorophyll has the same structure as Hemoglobin, except that it has a magnesium atom in place of the Iron atom. Chlorophyll is how plants make sugars to feed the process of building ATP through the Krebs cycle.








A magnesium deficient plant is identified by intervenial chlorosis, necrosis, and eventually a lockout of plant nutrients. The problems starts at the bottom of the plants and works it?s way up.









These images depict different stages and signs of a magnesium deficiency. The first picture is a Mg deficient plant in flower, and the second two are of the leaves to show what I mean by Intervenial Chlorosis.

Treating with an Epsom salts mix will clear this right up. "

how much should you give those pics are it. can you get it anywhere i was gonna try using foxfarm part with more mg in it.

gezzy da snowman said:

how much should you give those pics are it. can you get it anywhere i was gonna try using foxfarm part with more mg in it.

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Yeah that should be fine. But remember dude it might be a nute lockout.

I would flush first in case and then feed as normal next time. What is pH of soil runoff?

The run off from tap water was a little under 4.0 which is extremely low and is probably from using too much desert bat guano (first time using) i used 4 tablespoons starting at veg and havent been able to get the ph up even with ph up for more than a day. Any ideas they are already on week 6 and are nowhere near what they should be.

You need to get that pH up or its gonna get worse and kill them. Flush with pHed water until the runoff is the same as the water you put in.

is that going to be possible to fix with the bat guano already mixed in the soil.

I have been flushing with my tap water which reads about 7.3 right out of the faucet, the plants are still around 3-4.0 any ideas? will this be possible to fix with so much bat gauno

Is this going to be a problem?

Urmm I believe mix in some garden lime into the top soil. Should sort it.

How much epsom salt should you add to a gallon of water! I have two females that I belive have the same issue! I have the salts and going to water today but dont know how much salts to add to my gallon of water also should I flush with phed water before and then water or just do my regular gallon of water between the two plants

I water about every three days and I am about 6 weeks and 2 days from schedualed harvest

I started flowering about middle of july!

How much epsom salt should you add to a gallon of water! I have two females that I belive have the same issue! I have the salts and going to water today but dont know how much salts to add to my gallon of water also should I flush with phed water before and then water or just do my regular gallon of water between the two plants

I water about every three days and I am about 6 weeks and 2 days from schedualed harvest

I started flowering about middle of july!

Click to expand...

I have the same issue! I have one plant doing this while my others are okay. I checked my PH and it was around 4.5. Tried Fox Farm flowering nutes but it made it worse. Need to know how much epsom salt per gallon should I try? This plant was leafy as hell too, different than the AK-47 and Superskunk I'm growing. Very indica.

Use garden lime for increasing pH and 1 table spoon per gallon for your epsom salts i believe.

Flush if you think its a lock out.

So when adding nutes and watering will your ph usually go down (less than 7) or will it normally go up (7 or more)?

Also how do i test what the ph of the soil is?

No meter, just pool water testing chemical?

I can't though take the plants out or lift to take water sample!