Help me! Please

Hello all,

I have this marijuana plant growing outdoors in regular soil, nothing ever added, it is a strictly organic plant. Until about recently I had no problems. It grew to about 5 feet tall, was lush, healthy and was starting to bud. But in the past 2 weeks, I have had many problems. I had to take care of a leafhopper problem and got rid of them by just picking them off the plant every few hours. About a week ago, I noticed that on some corners of the leaves there was bronzing and eventually a dry crispy texture. I discovered that it was a minor infestation of spider mites and managed to keep it under control.

But today when I checked on it, there were many leaves that were droopy, yellow, and curling, especially towards the bottom of the plant. The top leaves are gross and the plant just looks very sickly.

Would anybody know what this could be from and what I could do to make the plant healthy again before harvest? If pictures are need please just say so and I can take them.

Thank you for any help in advance.

-Derek
 
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I am not a very good photographer but here are some pictures. If any further information or photos are needed please inform me.
 
I don't mean to sound antsy or annoying in any way but I am not sure if time is a factor here or not, so could I get some advice quickly just in case time is of the essence? Again, I stress that I don't want to sound rude or annoying in any way.
 
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