Help, Leaves turning yellow, brown spots, falling off

Ok this is my first post here and i want to say ive been trying to figure this out on my own for about 2 weeks now and not any luck.

My setup is for 3 plants in a closet
3 100w cfls (1 for each plant)
scotts soil w/o nutes
water that has sat for 24hrs b 4 using
fan
temp fluctuates between 76-82
humidity is usually about 44%
ive used plain miracle grow 1 time
my lights are on 24/0
plants are now 5 weeks today

as for the problem i am having is i think multiple things but the leaves at the bottom are turning yellow and it take a about 2 days for them to completely turn yellow but its only 2 sets at a time, they also get light brownish gray spots near the leave tips only on the bad leaves. about 4 days after it starts to yellow they fall off and then the next set up start to yellow. I also have a gnat problem and i put sand in the pots 2 days ago to fix but i still see some gnats like 3 when i open the door but i kill them, and since i put the sand nothing has gotten better it just continues to deteriorate slowly.

Your pots look small. They are yellowing from a lack of nitrogen.

here these were taken 5 mins ago

Feed them things

the last picture

Any suggestions on what nutes i should get to cure my problem? (i know nitrogen but brands)

also in my last picture the plant on the left, the leaves are curling under is that from over or under watering? i feel like they have the same symptoms and don't know how to tell, i feel like they are watered enough but again this is my first grow and i don't quite have it down so well yet obviously.

turbocivic6776 said:

also in my last picture the plant on the left, the leaves are curling under is that from over or under watering? i feel like they have the same symptoms and don't know how to tell, i feel like they are watered enough but again this is my first grow and i don't quite have it down so well yet obviously.

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Any nutes with a higher first number should be fine, you also should be looking at repoting in 3gallon+ pots and more light, to check if you need to water stick a finger in if its dry water if its wet wait

alright thanks for the help i will see what i can do

what type of soil/medium are u using there?

hicksy said:

what type of soil/medium are u using there?

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I am using scotts soil w/o nutes but i have sand for the top 1" so it kills the gnats

Needs lime,give um these 2 things:http://www.google.com/products?hl=en&rls=com.microsoft:*&ei=biInSuWfKKfcswPqgP0v&resnum=0&q=miracle+grow+liquid+houseplant+food&um=1&ie=UTF-8&ei=cSInSsKGCKTgtAP3uLlI&sa=X&oi=product_result_group&resnum=1&ct=title http://www.google.com/products?hl=en&rls=com.microsoft:*&ei=mSInSrntDY3utgO94aRR&resnum=0&q=espoma+garden+lime&um=1&ie=UTF-8&ei=miInSuTKKoX-swP9p4Q0&sa=X&oi=product_result_group&resnum=4&ct=title For the gnats you can buy neem oil or yellow sticky traps........

what is ph currently?

Obviously nitrogen but this might be because of an insufficient root system which comes from over watering or because your pots are too small. I would definitely say you have a bit of a root issue with those pots.

Sparatik said:

Obviously nitrogen but this might be because of an insufficient root system which comes from over watering or because your pots are too small. I would definitely say you have a bit of a root issue with those pots.

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sorry i have not checked this thread for a while umm my ph was i think 6.8 or so and i also upgraded my pots to about 3 gallon and now my plants still loose about a leaf a day but now they are 4' tall. I gave them nutes and plenty of water but still losing bottom leaves oh and they are not yellowing anymore just falling off and some are just browning at the tips not yellow! I will be putting them in 12/12 soon maybe in a week or less.