dark brown and purple top leaves and stunted bud growth

[zebu111]

whats the best thing to do to right the problem ?

use bottled drinking water, (not distilled),
AND NO FERTILIZERS... NADA... NONE

if you dont have a soil meter get one and make sure
ya dont overwater, the single biggest mistake growers make

let yer plants almost dry out before watering

marijuana does best when it's a little thirsty, but not too much :smokin:

good luck