The Cannabis Compliance Board says Henderson-based Clark Natural Medicinal Solutions treated some plants with Ethephon.
Since 2009, the exploding air bags have killed at least 33 people worldwide.
It's the biggest blow yet to the embattled company that is widely blamed for sparking a surge in teen vaping.
A final signoff from the Centers for Disease Control and Prevention is expected this weekend.
A new rule requiring that infant sleep products have a sleep surface angle of 10 degrees or less starts next week.
The Coastal Fire was reported at midafternoon Wednesday.
While other countries allow Moderna vaccinations for older children, the U.S. currently limits them to adults.
The agency said it wants to see more data from Pfizer before proceeding.
The move could open the way for the very youngest Americans to start receiving shots by early March.
Pfizer's COVID-19 vaccine received full approval last summer.