please help!

[mike33hull]

hi i am 4 weeks into flowering and all my top leaves are dark brown and purple they are curling and bud growth as come to an halt. Im in 15 ltr pots using 250 sodium light and growing in cocoa. Pls someone help

[Rusty Trichome]

Need more info. If you copy-n-paste the troubleshooting form, (link is in my signature) and fill it out as best as you can, we'll have a better idea of what's going on. Till then it would be inaccurate guesswork.