Sunny Days in Sandringham Drive, Walton-le-Dale, was first registered in 2007.
A spokesman for school inspection body, Ofsted, said: "Ofsted did not close the nursery. Following an inspection on April 1, the provider made the decision to close her nursery while she took action to improve matters."
A previous inspection by Ofsted in July 2016 rated the nursery as 'good' in all areas.
The Post was unable to contact the nursery for comment over the phone on Thursday.