the reason your lower branchs are going brown is nutrient burn you i can see brown tips on most pics try lower dose are you ph water and you are over watering see the tips curling down you want your leave pointing up to the sky almost like there praying what i would do if i was you do not feed till its dry so you can lift the pot and there is no weight then water slow lil bit at atime or you will shock her but your doing a good job bro keep up the good work
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