Huge problem and I have no idea whats wrong with these plants

I put up a few pictures please help me I dont want to lose everything

I have 4 plants 3" under a 400 watt hps and a fan on low brezzing over the plants.....

I notices some brown yesterday but today is very bad..... please help asap i turned the light off thinking it might be sunburn... but idk im kinda new at this

thanks for your time

Need more info. Media, temp, humidity, nute schedule, etc.

Without extra info I think they were too close to the light.

oh yeah. 3" is way too close. More like 12" 15".

And re pic no. 2, you have a magnesium deficiency as well. the banding on those lower leaves is pretty distinctive. They'll start dying and curling up soon if you don't treat with cal-mag or epsom salt.

3 inches isnt too close if you have good air flow and its cool enough looks like its burned though

Well, then it's too close in this case. Clearly. Nothing else causes that kind of damage at the top of the plant.

mauricelm said:

3 inches isnt too close if you have good air flow and its cool enough looks like its burned though

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I'd say light burn. They are to close to the lights.

shnkrmn said:

And re pic no. 2, you have a magnesium deficiency as well. the banding on those lower leaves is pretty distinctive. They'll start dying and curling up soon if you don't treat with cal-mag or epsom salt.

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The only stores i have near me is Lowes and wal-mart
would they have the cal-mag?
and what is cal mag i have never heard of it.
also use epson salt for what???? to season my potatos??

right now thy are maybe 3" away but i will move them dow to 13" away now,

i water every other day and i use fert every other water, its about 80deg and im not sure of the humidity, and all i have for air flow is a 6" fan on low.... im not sure how much air they like

media is sand and marical grow organic soil

lol. Don't season your potatoes with epsom salts. It's magnesium sulfate. You can buy it in any drug store for 2 dollars. Nice for soaking sore feet. But added to your watering or used as a foliar spray it will prevent premature loss of fan leaves during flowering. Cal-mag, Magical, Magpro, etc are all trade names for calcium-magnesium supplements you can buy at grow shops. MJ uses a lot of those two elements, particularly during the first weeks of flowering, so deficiencies like yours are quick to show up around weeks 4 onward.. I don't recall off the top of my head how much is called for (like a tablespoon/gallon watered in, but don't quote me on that ) but it will fix that issue and help you grow better bud. Epsom Salt is a good thing.

Raising the light is the right thing to do.

AMK792 said:

The only stores i have near me is Lowes and wal-mart
would they have the cal-mag?
and what is cal mag i have never heard of it.
also use epson salt for what???? to season my potatos??

Click to expand...

I quess im going to the grow store in the morning

Looks like your in soil, so you have some buffers. What kind of pH are you watering with? Also, what are you watering with? Nutes, or just what's in the soil? Is this problem just on the top new growth, or is it on old growth as well? Need more info. 3" under a 400w hps is definitely too close. No matter the temp, it will cause light bleaching. Believe it or not, there is such a thing as too much of a good thing, and light is one of them.

We need to know more about your setup, and how you've been growing thus far, etc.

I don't know guys. I say give more info. Looking at pic 2: You have some claw, some droopage, some brown spots and some yellowing on the bottom. That's a lot of symptoms...

You need to do some more research bud. This is my second run and i can tell you that you need to place your hand under the light for a few seconds if it gets warm its to close. Also the epson salt is Magnesium-Sulfate. Its good for your plants. Go buy a PH meter ($10) and make sure you PH the water to like 6.0 when you feed.
I think if you surf around on the site you can answer of of these yourself.
good luck

now they are 12" - 15" under the light i added a better fan soil ph is at nuetral im not sure what the water ph is but ill test it later i have been using marical grow bloom boost, epson salt, magical and i water when the soil gets dry every other day at the most, light is about 9-12 hours a day and i reallllllllllllly want it to be good and ready.... also when do i harvest? lol but really when is it ready?