However, Quinlan and Bennett's lawyer Paul Davison QC said none of these undercover recordings were consistent with the charges.
Staff employment contracts adhered to a strict code of conduct, and required drugs be kept away from work, he said.
"Every communication is consistent with them [the accused] enforcing the standards and wanting to remain within the law," said Mr Davison.
Switched on Gardener may have employed people with an interest in "the herb", but that didn't mean they did anything illegal.
He said the company's "no cops" on the payroll policy was possibly a joke.
"The evidence that you have heard falls woefully and way short ... of amounting to proof beyond reasonable doubt that Mr Bennett and Mr Quinlan are guilty of any of the charges."
Cochrane's lawyer Matthew Dixon said his client was a purchasing officer for Hydroponics Wholesalers and was primarily "all about the numbers."
He said this company was set up to cater for the growing needs of a legitimate industry - commercial and hobby indoor gardening.
Mr Dixon likened the police operation to undercover officers going into DB Breweries and asking the malt supplier how many people who get served at bars are underage.
He said Cochrane would have had "less than a vague expectation" that the products would have been used to cultivate cannabis.
The Crown says Switched on Gardener was a "one stop shop" for cannabis-growing equipment.
Defence lawyers for the other two accused are expected to give their closing addresses to the jury tomorrow.
