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NEW: The execution is postponed because the drugs "appeared cloudy," Georgia says

Gissendaner's was scheduled to die at 7 p.m. Monday for a murder plot targeting her husband

CNN  — 

For the second time, a Georgia woman’s execution has been postponed – this time because of concerns about the drugs to be used.

Kelly Renee Gissendaner was scheduled to die at 7 p.m. ET Monday.

“Prior to the execution, the drugs were sent to an independent lab for testing of potency. The drugs fell within the acceptable testing limits,” the Georgia Department of Corrections said in a statement.

“Within the hours leading up to the scheduled execution, the Execution Team performed the necessary checks. At that time, the drugs appeared cloudy. The Department of Corrections immediately consulted with a pharmacist, and in an abundance of caution, Inmate Gissendaner’s execution has been postponed.”

The 47-year-old was originally scheduled to die on Wednesday, but that execution was called off because of winter weather.

Thousands of supporters

A petition saying the mother of three has turned her life around, even earning a theology degree while in prison, had garnered about 80,000 signatures as of Tuesday morning. Organizers plan to deliver it to Gov. Nathan Deal, though in Georgia, the governor has no authority to grant clemency.

Gissendaner has become a “powerful voice for good,” the petition says of the woman convicted of orchestrating her husband’s death in 1997.

“While incarcerated, she has been a pastoral presence to many, te