It doesn't really look like a hydrohut death to me either.....usually the entire plant turns lemon yellow and then just folds.....I think the issue is your ph.

Your question as to whethere they will last until finish is unknown. Poor conditions create unhealthy plants. Yours are obviously not healthy. Unhealthy plants tend to develop disease such as root rot etc....which can destroy your plant with 48-72 hours.

That's why growers like Stinky and myself don't slide along praying things will hold "just a bit longer" (because I've lost that game more than once) but try to make sure that plant doesn't GET into a situation where illness becomes much more likely.
Weedhound Reviewed by Weedhound on . Bright Yellow Patches & leaves Turning Down, & Some plants turning up! - Any Advice? Hi all, this is my first grow, sort of a fumble my way through job! my plants are into their 7th week of flowering now, we only started using nutes since week 4, but only in light amounts the plants are generally healthy but over the last few days one has had problems with the leaves turning down & bright yellow almost dayglow patches on the dark green leaves, any ideas what could be causing this? some of the other plants leaves are turning up, as in the 3rd picture, is this a symptom of Rating: 5