French winemakers light up fields to save the 2021 harvest from early season frosts Posted 6 updated 1 AprApril 2021 at 9:51pm Winemakers have been using fire to try and heat their vineyards to save them from frost. ( Print text only Cancel French winemakers have lit candles and burned bales of hay to try to protect their vineyards from sharp spring frosts, with the forecast of more cold nights this week raising fears of serious damage and lost production. Key points: French winemakers are currently doing all they can to save this years vintage They are using heaters and lighting bales of hay to try and keep the vines from freezing