Are THC Vape Pens Legal in Texas After the Veto? 2025 Guide Spotted this in a Grapevine gas station Starting Sept. 1, it will be illegal to sell THC or hemp derived cannabinoid vapes (and a few other types of vapes) in Texas. This will You asked we answered! Vape pens and cartridges are legal in Texas, but only through the Texas Medical Marijuana Program (TCUP) as of September 1st, 2025. That means only qualified Texas just banned a huge chunk of vapes from mint flavors to devices made in China., Shops are tossing inventory into the trash, customers are walking out empty handed, and fines run as high as $4