whats wrong with my leaves ????? help needed

currently growing 4 x lowryder power flower, plants were growing ok during seedling / veg period.
plants are now in flower currently 38 days old. have been feeding them with the hesi coco nutrients follwing the nute guide at half strength.

one of the plants just keeps on stretching & stretching & is nearly twice as big as the other 3 plants.

all of the plants are also getting light green / pale leaves with a rusty look to them & are also brown at the leaf edges. (pics included).

also the stems & branches on 2 of them are getting very red. is this normal for these plants ? have included pics of them.

any help is much appreciated as i dont know what to do. 1st time attempt with lowryder plants & handful of normal grows.

thanks....

brown edges is nute burn. and purple stems can be over or underwatering... and plants can double their size during flowering stage

Wow way to make a first post. Congratulations on being an asshole

your the asshole you prick ! i come on here looking for advice not for nob heads like you to put stupid random comments on that offer no help what so ever. if something is wrong with the thread just say it thats the whole point of these forums.to share information & help between people. thanks for your advice it helped a lot dickmeister. heres mine for you .. keep fucking your mum you inbred !!

I don't know how this could have derailed so quickly into a bunch of bickering...I don't see what happened or how anyone was an asshole...fuckin' strange.

Anyway....I'm not familiar with Hesi nutes, do you have any more information on what you've been feeding? It looks to me like your plants are starving to death for more food, but there could be reasons for that outside of just the amount of food they are receiving. How much of what have you fed them? Is there a bloom nute that differs from the veg nutes? What is the N-P-K of the nutes you are feeding right now? Are you feeding with every watering or water-feed-water-feed?

What is the PH of your runoff?

I don't know why no one has helped you, or why this turned into a shit-fest, but I'll help you out brotha.