Leaves clawing down and yellowing, lime green colored leaves

Any idea what deficiencies this could be. Growth has come to a halt. Tips and edges of almost all the leaves looking brown and dry with very bright green leaves. Looks as if it's on the verge of dying. Also bigger bottom fan leaves look green and ok but not healthy.

Too much nitrogen. Back off on the food for a while.

Too much nitrogen does not cause the leave's edges to burn! The symptoms you're seeing is a lack of potassium. Without more detailed info, it's impossible to say whether it's lacking or locked out.

Blitz35 said:

does not cause the leave's edges to burn!

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Nute burn does

Blitz35 said:

Too much nitrogen does not cause the leave's edges to burn! The symptoms you're seeing is a lack of potassium. Without more detailed info, it's impossible to say whether it's lacking or locked out.

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Agree, need more info like medium, nutes, pH etc.

Hugo Phurst said:

Nute burn does

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Nute burn does not specifically mean nitrogen lol. Most nutes in excess will not burn the leaves edges like that! Very few elements in excess actually cause a burn at the tips/margins. It's just a common reaction by inexperienced growers, that as soon as they see burning, it's too much nutes. Excess potassium, phosphorus, sulfur and even chlorine (though that's rare), will cause burning at tips or edges, though other/different symptoms would be present as well, depending on which of said elements is in excess. Magensium, calcium, nitrogen, iron, copper, zinc, neither of these in excess will burn the edges/tips of the leaves. Actually, a lack of potassium or sulfur would also cause the tips to burn, and so will a lack of copper or zinc...again, with other symptoms showing as well. Newbies should learn, that burnt tips, more often than not, are not due to overfeeding!

Thanks for the input everyone I am I fairly new grower. I'm using coco and ph is at 6.0. Ppm is around 800. I originally thought it was a cal mag defiency and decided to try that. I began to see slight improvement and growth but symptoms worsen. The plant is about a foot high Other plants growing great . Using foxfarm nutrients. Would flushing the medium be a good idea at this point?

Classic potassium deficiency.

Blitz35 said:

Too much nitrogen does not cause the leave's edges to burn! The symptoms you're seeing is a lack of potassium. Without more detailed info, it's impossible to say whether it's lacking or locked out.

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Ding ding ding... Correct answer. Often potassium is locked out by low pH.

https://www.sensigarden.com/potassium-deficiency-marijuana/

What you been spraying on it ? .... see dried spots