Whats wrong with my plants please help !!!!!

its about a 5 week old auto flower strain growing under a 600w MH bulb just started doing this about a week ago the temp in the room when lights are on are about 90 deg when lights are off about 70 deg I've been watering about every other day and doing half nutes every week the humidity is about 50 not sure whats doing this or if iam doing something wrong iam pretty new at this so any help would be appreciated thanks

Looks like heat stress to me, 90 degrees seems really really high to me, I might be a new grower but honest that does seem entirely too hot

90 degrees? how long would you last in that kind of heat? you're cooking your plants.

Are you giving the girl nutes? That looks like a defficeincy to me.

I think 90F is ok. I haven't had any problems keeping my plant at that. Maybe your girl is touchy. She does look deprived to me though.

Wanted to add it looks most like phosphorous deficiency to me.

bmxican828 said:

its about a 5 week old auto flower strain growing under a 600w MH bulb just started doing this about a week ago the temp in the room when lights are on are about 90 deg when lights are off about 70 deg I've been watering about every other day and doing half nutes every week the humidity is about 50 not sure whats doing this or if iam doing something wrong iam pretty new at this so any help would be appreciated thanks

Click to expand...

what soil you usuing?

temp too hot better air circulation ( or fans ) ... also you may need to feed more often..... once a week is not enough (depending on your soil)...i usually feed/ feed/ just water.
when you water/feed do you water till a good amount runs out the bottom ? if not start asap

bmxican828 said:

its about a 5 week old auto flower strain growing under a 600w MH bulb just started doing this about a week ago the temp in the room when lights are on are about 90 deg when lights are off about 70 deg I've been watering about every other day and doing half nutes every week the humidity is about 50 not sure whats doing this or if iam doing something wrong iam pretty new at this so any help would be appreciated thanks

Click to expand...

Well as was said, your temps are too high, and depending on how much perlite you have mixed in your soil, every other day could be too much or not enough....and by 5 weeks you should be doing more then 1/2 strength...at least 7/8s to full nutes if not more...and since it's an auto you may want to be feeding bloom nutes also...it looks like it's hungry to me...you will find many different suggestions and many different opinions here...this is because you will have to find what works for you...trial and error my friend and lots of patience...lots of patience...lol..and welcome to RIU...