DENVER – Michael Jolton was a young father with a 5-year-old son when Colorado legalized medical marijuana in 2000. Now he’s got three boys, the oldest near adulthood, and finds himself repeatedly explaining green-leafed marijuana ads and “free joint” promotions endemic in his suburban hometown.

“I did not talk to my oldest son about marijuana when he was 8 years old. We got to talk about fun stuff. Now with my youngest who’s 8, we have to talk about this,” said Jolton, a consultant from Lakewood.

A marijuana opponent, Jolton, 48, is among legions of American parents finding the “drug talk” increasingly problematic as more states allow medical marijuana or decriminalize its use. Colorado and Washington state have measures on their Nov. 6 ballot that would go a further step and legalize recreational use of marijuana for adults.