Brown made his comments Sunday during an appearance on NBC's Meet the Press. He was asked whether legalizing marijuana was a good or bad idea for California.
Brown said the state already has medical marijuana which gets very close to what Colorado and Washington have.
"I'd really like those two states to show us how it's going to work. The problem with anything, a certain amount is okay but there is a tendency to go to extremes. And all of a sudden if there's advertising and legitimacy, how many people can get stoned and still have a great state or a great nation. The world's a pretty dangerous, very competitive. I think we need to stay alert."
In a wide-ranging interview Brown also discussed California's drought problems, climate change and his future political career.
Governor Jerry Brown has signed off an agreement with two of California’s labor unions.
California children under the age of 2 will now be required to ride in rear-facing child seats. That was one of several bills signed into law today by Gov. Jerry Brown.
A bill awaiting action by California Governor Jerry Brown is designed to protect humans by managing the treatment of livestock.
The Legislature began its final week of session Tuesday with the Senate and Assembly taking action on a number of bills.
California may start paying home healthcare workers overtime this fall.