Two giant hot-air blowers are being trialled in South Island vineyards and cherry orchards to fight off severe spring frosts.
The Kiwi invention could protect crops and transform the horticulture industry.
The blowers stand five metres tall and blows out warm air like a giant blow drier.
Known as the Heat Ranger, it's one of two machines being put to the test in Otago and North Canterbury.
Designer Bruce Koller used to grow blackcurrants, but it took just one severe frost to take out his entire crop and force him to sell up.
Watch the video for the full 3 News report.
