Colorado has become quite famous for its love of gardening - ahem - certain types of plants. If you've recently purchased - ahem - plants in Colorado, be aware that some banned pesticides have been detected in Colorado marijuana

CNN recently decided to take samples of marijuana purchased in the state to labs. What they found is troubling.

CNN decided to do its own tests to see exactly what's in some of the marijuana products sold at Denver dispensaries.

Because of state laws, consumers cannot test their own pot products for pesticides at state-licensed labs. Instead, the labs are only allowed to test marijuana submitted to them directly by pot businesses.

So, CNN asked two Denver pot shops to agree to submit three samples each for pesticides testing to Peter Perrone, who runs a company called Gobi Analytical, one of the few state-licensed labs. Perrone has tested thousands of pot products for pesticides and his lab is the go-to lab for the city of Denver's investigations.

The dispensaries submitted a total of six samples, including flowers, edibles and concentrates.

Five samples tested clean for pesticides, but one concentrate tested positive for a neurotoxin called imidacloprid.

So, what now?

Because of the CNN testing, officials launched an investigation, which led to a voluntary recall last week of 2,362 pot products including 23 different types of pot concentrates, all made from marijuana grown and distributed by Tru Cannabis.

Tru Cannabis is no stranger to problems with pesticides. The company was cited as one of two growers in a voluntary recall just last month when three pesticides banned by the state for use on marijuana, including imidacloprid, were found in plants and pot products.

Just birth pains as Colorado tries to figure out how to regulate the marijuana industry or a sign of a more dangerous problem?