Help, Newbie with pics...Any help apprecaited

So, I am currently 24 days into a bagseed grow with 3 who-knows-what seeds. They were looking excellent 2 days ago but have since started turning very light green and the bottom leaves are turning yellow, ones that were fat and green previously, I mean real fat.

I a using 8-26watt CFL's (6500K), MG Organic Potting Mix, and they are planted in 6 inch clay pots and on 18/6. I water every 3rd day and have not given them anything but water.

Back to my problem; From my research I've concluded that it's most likely a N deficiency? My potting mix says it continually feeds up to 2 months so I have been avoiding giving any nutes cause I didn't want to burn. Has anybody experienced this prob. before with such a quick change from fat and green to thinning and very light green/yellow? I haven't checked my ph, but I do live in CO. where the h2o is excellent so i thought i could skip this step for a while... I am almost sure it's not overwatering I barely give it enough water to drain out the bottom hole and its happening the same to all 3 plants. My temps are a bit high around 85F but up until know thats been fine. Could my plants have used up all the nutes in a 6 inch clay pot in 3 weeks already, I wasn't planning on transplanting yet but maybe I need bigger pots already after only 25 days????

This plant is only about 4 inches tall and was on its 4th or 5th node already before this started yesterday, and now as you can see from the pic the bottom fat leaves that are mildly yellow were once fat and green and spread out, not droopy! And the new growth on top is a little more green but they seem to be much thinner leaves. help.... I'm thinking of adding Peter's "Jack's Classic 20-20-20", thoughts????

Here's a pic of what she looked like 3 days ago...

That does look like N deficiency.. always starts at the bottom. Try your Jack's classic at 1/4 of the label-recommended strength (yes... 1/4). BTW, the older leaves will never recover -- look for the solution in your new growth / maintenance of your existing growth that hasn't yellowed.

here's a link to my post that has some good amount of discussion about my problem, someone tells me on their that is most likely not N deficiency because its the NEWER leaves that are affected first and my problem is happening to the older leaves and also its too early for my soil to have an N def. Could you clarify because i am most likely going to just repot in bigger pots and use fox farms instead of trying to fix the possible N def.? from what i've gottn out of this discussion is that MG Organic Potting mix eats my ass and thats most likely the problem...

fauxsho02 said:

here's a link to my post that has some good amount of discussion about my problem, someone tells me on their that is most likely not N deficiency because its the NEWER leaves that are affected first and my problem is happening to the older leaves and also its too early for my soil to have an N def. Could you clarify because i am most likely going to just repot in bigger pots and use fox farms instead of trying to fix the possible N def.? from what i've gottn out of this discussion is that MG Organic Potting mix eats my ass and thats most likely the problem...

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I can clarify: they're just wrong. N deficiency always always always starts at the bottom. Plants are not as stupid as they seem -- when something is missing, they almost always allocate what is left to the new growth and sacrifice the old. In fact, I can't think of a single deficiency that shows at the growth tip first.

The transplant to FF will likely help things.. good stuff, has plenty of N but not too much. I don't know enough about MG organic to really comment on its (de)merits. Good luck.

thanks for your help, you've got some good points, i'm repotting now and i'm confident that'll perk em' up, what do you think is a sufficient time to add some "N" once I repot, they're going in 3 gallon containers, fox farms ocean, and i've got some Jack's classic 20-20-20 that i'm dyin to use. i'd like your thoughts on superthrive too, girl at the grow store seemed to highly recommend it so now i got some...