Yellow Leaves - PLZ help!

[ChrisToph88]

The plant is about 8 weeks old, and there are a lot of yellow leaves. I have read that this may be a Nitrogen problem, but the soil that I am using is rich in Nitrogen.

The younger leaves are usually green, but I have noticed that they are becoming more yellow as well. Temp ranges from 63-78, humidity is around 30-50%. I have a 400 watt HPS bulb about 2 feet from the top of the plant.

The soil that I am using is: Miracle Grow Potting Mix (SCOTTS MIRACLE GRO 70778300 POTTING MIX+MG8QT/6 - A Black Horse.com, Inc (http://www.ablackhorse.com/productcart/pc/viewPrd.asp?idproduct=100414))

I have included some pictures that will hopefully help determine what is wrong. If you need to know any other info, please let me know. Any help would be appreciated! Thanks,

[senorx12562]

It's hard to tell colors because of the HPS light, but potting soil with nutes do eventually run out of all the nutes. 8 weeks is more than long enough for this to have happened. Are you on a 12/12 photoperiod yet?

[ChrisToph88]

yes, i am on a 12:12 period. any ideas on what kind of nutrients i need at this point? Yeah, I figured the nutes were gone at this point, even tho the bag says it can feed the plant for 3 months...

It is really odd, because some leaves are dark green, but others are very pale and yellow. The younger leaves are generally more green then older leaves.

I know it is hard to tell because of the lights, I will try taking some more pictures and post them later.

Any other ideas/ suggestions would be awesome.

[LetsSeeYa]

yes, i am on a 12:12 period. any ideas on what kind of nutrients i need at this point? Yeah, I figured the nutes were gone at this point, even tho the bag says it can feed the plant for 3 months...

It is really odd, because some leaves are dark green, but others are very pale and yellow. The younger leaves are generally more green then older leaves.

I know it is hard to tell because of the lights, I will try taking some more pictures and post them later.

Any other ideas/ suggestions would be awesome.

I would bet that senorx is right. There is a chart in the plant problem section that talks about nutes. I have read when ya see a lot of yellow its a Nitrogen thing. That soil thats has the nutes in it is undependable iv seen for myself and others never tell people to use it. Growing outside i think is much easier.

Good luck man and keeper green :weedpoke:

:rasta:

[twitch]

has it always been in the MG soil?

i would go get, some fox farm soil, super thrive and get some fox farm nutes,
big bloom and tiger bloom and u might as well get the grow big since i am sure
u will do another grow. use the grow big for veg and the other 2 for flowering.
then transplant them in to the fox farm soil (try to knock off the excess MG
stuff before re-potting) then mix the super thrive in with ur water, cuz its
helps with stress, and water them. then after a couple of waters add the nutes
at half dose and work up from there

but thats just me and i am no pro by any stretch of the imagination

[wingedson]

I agree with twitch...ditch the Miracle Garbage, invest in some good soil/nutes and you will get good buds. I personally have not used any Fox Farms, only CNS-17. My buddy uses the FF lineup, and his buds are stellar. Also, in weeks 4 on a lot of yellowing will occur in large fan leaves. If your plant is otherwise healthy, which I am skeptical about due to their being in MG soil, it may not be an issue.