HELP NEEDED

first time grower needing some advice. growing 2 white russian in soil, using 600w hps lamp, i never fed them any nutes for the first 6 weeks then started using bio grow(2ml per 1 litre of water for 2 weeks. then started 4ml per 1 litre for 2 weeks. then started flowering using 4ml of biogrow and 4 ml of bio bloom.. im now 4 and a half weeks into flowering. on one of the plants the bottom leafs started going yellow and dying . now fan leafs right up the plant are starting to go the same..the other plant has never had a problem up till now and is starting to go the same. plus any info on red stems would be welcome.
have got some pics but struggling to upload them!!

Hey there fookdogg. I use Biobizz ferts and looking at the info you've given, you seem to be following the feeding reigime fine. I would suggest you give your plants a flush through. There is a guide to flushing at the top of this forum. I would guess that you have a salt buildup in your soil that is locking out some of the nutrients. I flush my plants every few weeks to every month so I know exactly where I am with my fert programme. It gives you a clean slate to work from. Hope this helps and I'm sure you'll get some more suggestions soon.

thanks for the advice man. any advice is welcome to be honest as it`s a first for me.
ive tried adding some pics ..dunno if it worked tho.
cheers

hope this helps

your nearing the end of flower, thats probly the plant doing its thing using the leaf nutes to produce buds. my ww is usually naked when shes done

thanks for the info . all help welcome.
what about the red stems?? is she gonna be ok?