Grow- blemish-free carrots Great for the organic grower Heavy crops for winter long harvests Beat Carrot Fly! To achieve a wonderful crop of carrots free of unsightly markings or larvae of carrot fly, it's worth taking simple precautions. Carrot 'Resistafly' F1 hybrid has a good resistance to carrotfly which can plague your well-deserved carrots when you least expect it. Expect a heavy crop of long, well-coloured smooth roots from this outstanding variety.