whats wrong with my plant?

My plant has been really healthy up until just recently. I moved my plant from a well ventilated grow box to a closet with little ventilation. It was very happy for about 3 days and then i woke up and checked and everything had wilted. Whats happeneing? Its about 4 weeks into flowering and Purple Widow.

you have your answer inoyur post...

a closet with little ventilation.

Yea what he said, honestly good airflow is very important it is what a lot of first time growers don't take into consideration

yup you need a constant source of fresh air for your plants, air circulation is a must in growing indoors

Whats a good way to get ventilation to a closet? I feel like there isnt a lot of options for that.

When you see twisted/yellowing new growth its usually a sign of root system stress as it is in your case, the plants are probably rootbound and dying or have some other root system issue. The ventillation is a big problem, what are the temps?

they are stressed out. spray some B1 on them (not advanced nutrients) it acts as a stress reliever, and then like they said more ventilation. you are probably using a HPS to Veg under? hit it with The Hammer or Mr. NO (was called Dr. No) it will stop it from growing taller but it will bush it out a bunch (what you want) Re Pot it and give it more light. and last it looks pretty tall. grab it in the middle with 2 fingers and bend that sucker over. it is not going to hurt it. if the stalk splits in the middle or a side breaks thats ok it is not going to kill it. it will heal. within 3 days all the leaves will be pointing upward. and tie it down. if you dont it will stand its self back up

root-bound....................