Search Cannabis and Hemp FAQs FAQs / Cannabis and Hemp How long does Boveda last for cannabis and hemp? Boveda will last from 2 to 6 months depending on your cannabis/hemp container and its surrounding environment. In its original packaging, Boveda has a two-year shelf life. Related Topics Can Boveda touch my cannabis/hemp? Which RH level is right for cannabis/hemp? Which size Boveda is right for your quantity/jar size? Which size Boveda should I use for different cannabis/hemp weights? How much Boveda do I need to use?