Hemp based THC vaping 'an epidemic' in Texas schools Fort Worth Star Telegram Smokable hemp products are effectively illegal in Texas starting today as new rules on cannabis compounds take effect. The rules, adopted by the Department of State Health Services, mark the 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 THC vapes banned in Texas. Shops say customers drained their supplies ahead of the ban, and now retailers are bracing for impact.