The price of pot is plummeting.

After falling below a national average of 300 dollars an ounce in February, the US Price Index dropped it another 11 bucks to hit a record low of 286 dollars an ounce in March.

As far as strains go, Diesel is the best-selling, beating out Kush as the month's most widely purchased strain.

Pot is legal for recreational use in Washington state and Colorado - but in Colorado that hasn't stopped the black market for marijuana.

One police official says it has done nothing more than enhance the black market because people still want to buy it tax-free.
--Rob Archer