It happens every year mid-January. Lemons grown in Australia become very scarce during this month and in February and so we rely on the United States for supply, as lemon consumption has grown dramatically in the last decade. Mother Nature is clever because she then has limes in abundance to replace the lemons. All Australian, fantastic limes. They will be much cheaper than the imported lemons and even half the price of imperfect lemons over the next month. Don’t pay more than you need to substitute an Aussie lime for an imported lemon.