 The adult use of pot and marijuana products are taxed at a rate of 9%. Now, the revenue goes to several funds in the state, including public health and a marijuana business assistance fund. Comptroller Brooke Learman says the growing pot industry holds immense potential for economic growth for the state of Maryland. Coming up on WTOP and Money News. These are very tough financial times for the pharmacy giant Walgreens. I'm Dan Roman. Traffic and weather in 30 seconds.