Denmark's caretaker prime minister, Mette Frederiksen, has again been called on to lead negotiations to form a government, after two rounds of failed coalition talks following inconclusive elections in March.

Frederiksen was reappointed by Denmark's King Frederik X on Saturday, after Deputy Prime Minister Troels Lund Poulsen, leader of the center-right Venstre party, announced on Friday that talks had broken down.

"Parties representing a majority in the Folketing (Denmark's Parliament) have recommended that acting Prime Minister Mette Frederiksen be appointed to lead negotiations on the formation of a government," the palace said in a statement.

After failing to form a new coalition in the first round of talks, Frederiksen handed the mandate to Poulsen on May 8.

"I did my best … Now, I'm going home to recharge. And yes … maybe mow some grass instead of untangling political knots," Poulsen said in a social media post.