"Once it gets into gorse and toi toi it doesn't matter how green they are, they just go," he said.
Firefighters had to pump water from a reservoir on the farm.
Mr Ashe said it took firefighters about four-and-a-half hours to put out the fire.
Nearby residents watched from neighbouring paddocks with beers in hand and helped pump water for the firefighters.
Graham Melton told the Bay of Plenty Times his brother owned the land but rented the house out to tenants.
He said it appeared a spark from an incinerator fire started the fire.
Western Bay Moana Rural Fire Authority principal rural fire officer Barry Low said the person who started the fire did not have a permit and could be billed for the cost of putting it out.
A full-time crew such as Mount Maunganui cost about $600 an hour while volunteer crews cost about $400 an hour plus the cost of the tanker, he said.
The restricted fire season begins on October 1 each year and remains in force until April 30. A permit to burn is required during this period.