Help - sick plants yellow of leaves

I hope some one can help - (outdoor krinkle). I posted my problem here a while back and it was suggested that it might be a nitrogen deficiency. I have added blood meal twice and no change. It is starting to show on other plants as well (different locations). I hope someone knows what this is and how to correct it. I was thinking of flushing all of my plants with fox farm Sledgehammer. Not sure how to do this though - if this will help advice needed please. Weeks after this occurred I decided to switch to Fox Farm because of the reviews. Because my ladies are already flowering I started them on week 5, would this be correct? I would appreciate any advice. My plants have been through soooooooo much this summer and were starting to look healthy, now this???

how does the new growth look on all the plants? a little twisted? Bone meal takes a while to work but I don't think it's N .
There is a form on the plant problems forum. With more info about all this some ideas will come forward.

Write out a problem report & will receive more replies.




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I've heard stress is hard on people, plants are the same.

Dahhhh, that "Fox Farm Nute Schedule" insert was supposed to go on a different thread...... Ooooops


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That looks more like a mirconute deficiency. It could be magnesium but that word gets thrown around so much it's kind of hard to tell. You have brown spotting but when the leaves were more green, did they develop a golden yellow spotting at first? If so, it's probably magnesium def. At any rate, you can solve micronute deficiency with a well-rounded fertilizer. If it's just magnesium def, you can beat it with one half teaspoon of epsom salt in a gallon of water, which you can buy at a drug store. Best thing is to use a more complete fert. I take it you're growing in soil. You'd go to your local grow shop and reading the back of the containers, look for a fert that has a bunch of nutes to it, like boron, sulphur, mag, etc. Dynagrow does and I think Supernatural does. You'd get the Terra version if you're in soil. If you've been ferting, don't give much, just enough to try to fight this problem. Follow the directions on the container.

Thanks everyone. It now seems this issue is affecting all my other plants as well. When this first happened I was using 20-20-20, but the leaves were already turning yellow. And so with some research I decided to give my ladies Fox Farm. Since the plants are already flowering I followed a schedule that started at week 5, Big Bloom, Tiger Bloom & Sesame. Am I correct in doing so? If a nute deficiency would it be wise to also use Grow Big? If yes how much, how often and for how long? The leaves started turning yellow only around the edge and then spread inward if that is any help. Please help, I am a newbe and am completely lost.

what is the ph on your water you feed it with ? do you have a ph meter ? becors i had the same problem with my plants and did get a ph meter and did make sure the water was spotless and the problem did go away :) worked more me

Sorry this is so late. Looks like you're overferting.

how long into flowering are you
definitely nute burn, simple solution. don't do anything! but give it water when the soil dries out.

U were using grow fert for 4 weeks of bloom, caused a potassium deficiency, the fox farm bloom schedule should take care of it. Damaged leaves wont get better but it shouldnt spread. Thats my thoughts from a single leaf pic and where ur at in flowering.