rapid wilting and yellow dead spots inbetween veins, need help fast!!

Hey guys, havin a little trouble with my 2nd grow.

heres what ive got:

8 autos, 1 White Widow, 2 AK47, 2 Northern Lights and 3 Berry ryders (the 3 berry ryders have been growin for just over two weeks where the other bigger ones are about to start there 6th week on monday)

My equipment:

• growing in a grow tent in my room
• 600w HPS (switched from a 400w MH yesterday)
• I have an inlet fan pulling air from my slightly open window for fresh Co2 blowing into the bottom of the tent
• the air is being pulled through a carbon filter, through a cooltube and then vented out into my room
• I am growing in 3 gallon air pots using Pro-Mix BX soiless mix
• I have mostly fed them just water (soft water), which i was changing the PH of to around 6.2. I have given them one very small feed of foxfarms at the begining of week 4 (which they didnt seem to like much, burnt tips)

The problem:

Ok so everything seemed to be ok until i had a little drooping issues and burnt leaves before and i asked on here for advice. I was told that my plants looked hungry and as Pro-Mix BX has little nutes which i knew already, I should give them a 1/4 strength feed. I did this, and they started to get yellow tips at the end of the new growth and on other random fan leaves, which im guessing means, they didnt need fed anything.
I let the soil dry out and they all seemed to be ok, they started to all perk up again and there was no continuation of the nute burn, however i gave them each just under a gallon of water last monday to fully saturate the soil as i think there were lots of dry pockets in the soil. And since then they have been starting to droop (white widow especialy) more and more. yesterday i switched to the HPS as i started seeing preflowers about a week ago, and after waking today to check on them, I have found yellow dead spots inbetween veins on lower fan leaves, the leaves are really twisted, and some of them are dark brown and really dry, they are all droopy as hell too. in the pic of them all ( sorry bout the HPS orange glare ) the one at the back right of the tent was actualy still nice and perky until today, it has started to droop too, which confuses me as to why this is happening. The soil is still really damp so they are overwatered, but why the yellow/brown dead spots?

In the pics I have just taken pics of one of the plants to show you the problem as it is the same on all of them.

any advice would be greatly apreciated guys as this seems to be progressing pretty quick now, peace.


Also, thought id point out something pretty awesome! my White Widow is splitting two of its side colas into two, as in... one shoot, is turning into two.. giving me double the bud sites.. wtf?!

forgot to add aswell

my temps are between 20-26 degrees celsius

and humidity between 40-50%

Well, they look overwatered (the limpness) and hot. Take a skewer and very gently poke at the soil to create aeration...you can run it up through the drainage holes as well. You may have a phosphorous lockout, bugs, root rot, heat stress, or nutrient burn. Did you let the soil become bone dry? do you have a magnifying glass? Raise your light 4-6 inches while this is being fixed....don't stress. Logic and calmness is the solution.

ye i let them dry fully before i gave them the gallon of water each.

I also gave them a weak foliar feed of epsom salts before i made this thread as they havent really been getting any magnesium due to my soft water, hoping it might help, time will tell with that or whether thats messed em up more.

Ive checked them for bugs and they dont seem to have any. im unable to check the roots jus now cause the soils too damp but ill try an see when its dryer. I doubt its heat stress as I just had a few weeks of snow and freezing temperatures causing the temp in my tent to go down as low as 15 degrees celsius. now the weathers back to normal and the HPS is in, the temps are reaching 26 celsius, max.
Also raised my light about 5/6 inches.

idk man , if your useing a hps the light should be at least 3 feet away depending on watts. leaves usually turn like that when thare (rejecting) light yes plants do move towars or away from lights, just a tip.. if your had under florcents they can almost touch the bulbs n be ok, EVERY THING I EVER TALK ABOUT ON HERE ARE GHOST CHILLIES AND IM FULL OF SHIT ON ALL MY POSTS,

djdude said:

ye i let them dry fully before i gave them the gallon of water each. I also gave them a weak foliar feed of epsom salts before i made this thread as they havent really been getting any magnesium due to my soft water, hoping it might help, time will tell with that or whether thats messed em up more. Ive checked them for bugs and they dont seem to have any. im unable to check the roots jus now cause the soils too damp but ill try an see when its dryer. I doubt its heat stress as I just had a few weeks of snow and freezing temperatures causing the temp in my tent to go down as low as 15 degrees celsius. now the weathers back to normal and the HPS is in, the temps are reaching 26 celsius, max. Also raised my light about 5/6 inches.

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Your roots suffered drying out and when you water them they do not have the ability to drink as they used to so they are waterlogged, also they cannot absorb nutrients as well. Epsom salts I would support but very minimally and always in the dark. Foliar feeding is the best route for the time being. You are become deficient and when watering continues use root enhancers (humic acid, beneficial bacteria, seaweed) to give back what was lost. Soilless mediums are very low nutritionally, Trace elements and minerals are likely deficient. Here is what makes this difficult a hypothetical lack of calcium will impede the absorbtion of phosphorus which in turn causes poor rooting and spots. Too much magnesium causes calcium lockout. It is all woven and solutions are convoluted, when in doubt I flush with 1/4 strength and ramp it up so at least I can deduce that the lockout possibility is not due to overdose. PH swings cause lockout as well, cold temperatures can too.

burgertime2010 said:

Your roots suffered drying out and when you water them they do not have the ability to drink as they used to so they are waterlogged, also they cannot absorb nutrients as well. Epsom salts I would support but very minimally and always in the dark. Foliar feeding is the best route for the time being. You are become deficient and when watering continues use root enhancers (humic acid, beneficial bacteria, seaweed) to give back what was lost. Soilless mediums are very low nutritionally, Trace elements and minerals are likely deficient. Here is what makes this difficult a hypothetical lack of calcium will impede the absorbtion of phosphorus which in turn causes poor rooting and spots. Too much magnesium causes calcium lockout. It is all woven and solutions are convoluted, when in doubt I flush with 1/4 strength and ramp it up so at least I can deduce that the lockout possibility is not due to overdose. PH swings cause lockout as well, cold temperatures can too.

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I concur it looks like they dried out too much and they also look like they're probably having PH issues.