By David SmileyMiami Herald

When Florida’s medical-marijuana industry was starting a few years ago, business owners had a big problem: Where could they find a bank to take their millions?

For marijuana distributors, opening bank accounts isn’t easy. The federal government still considers cannabis an illegal substance without medicinal value, so most banks haven’t been willing to take their money, even though 29 states have legalized the drug for medical use, and some for recreational use. And these businesses would be handling too much cash to stash it under a mattress.

Then First Green Bank, a community bank that operates only in Florida and doesn’t require a federal charter, stepped in. By this summer, it was handling accounts for six of the state’s seven licensed producers of medical marijuana.

But First Green has announced that it is closing the accounts of its cannabis clients and won’t be handling their money past early January.

Initially, the announcement — just a few months after the bank was the first in the state to handle medical marijuana clients — sent some clients looking for alternatives. But the bank has apparently found a new institution willing to take its place, and companies that spoke to the Miami Herald said they’re confident that Florida’s 40,000 card-carrying medical marijuana patients won’t notice any hiccups.

“There will be no interruption or change in operations as far as patients and members are concerned,” said Jake Bergmann, CEO of Surterra Holdings, a medicinal marijuana operator and a First Green client.

Bank executives declined an interview and would not explain why they’re canceling clients. But the Miami Herald has learned that the decision is because of a looming acquisition by a larger financial institution concerned about assuming the risk that comes with handling medical marijuana money.

“It’s an important initiative