The extraction also breached an abatement notice issued by Environment Southland on November 27, 2017; the company had been found taking water from the Winton Stream without a resource consent.
Just two days later, on December 6, a compliance officer found the company was taking water from a different property outside the area of its resource consent.
A compliance officer told the company's regional manager, Roy Smak, the company was not permitted to take water from that property.
Shortly afterwards, the council became aware the company's irrigator had operated overnight from December 6 to 7 and a compliance officer saw an irrigator being used on December 7.
Prosecuting lawyer Joshua Shaw said both the company and the manager had acted ''deliberately'' and ''highly recklessly''.
Defence lawyer Grant Wilkin said Smak had been confused about the consent after dealing with council staff.
''There seemed to be times when council staff didn't seem to know what the rules were either.''
Environment Court Judge Brian Dwyer said the company staff should familiarise themselves with the law and the company showed a ''high degree of carelessness''.
Horizon Flowers was fined $17,800 on each of the three charges it faced and Smak was fined $7125 on two charges of unlawfully taking water.