Will tren close my growth plates

Tren is a 19-nor meaning that it does not aromatize and will not directly convert to estrogen. That said, tren is known to increase prolactin in the body. While prolactin does not close growth plates itself, prolactin has been show to magnify estrogen's effects in the body. This may mean that your growth plates age faster with the same estrogen level. I also warn that estrogen is necessary for you to function and using a powerful androgen --especially one as psychoactive as tren-- without estrogen support is a terrible idea. Not to hate, but given the level of understanding expressed in your question, I doubt you have the knowledge or maturity to pursue this responsibility.