Generally available all year from the USA. Also known by the names: field greens and spring mix, they are best stored between 32-34 degrees F, in a plastic bag lined box. Fluff-up occasionally by hand to increase shelf life, do not mist, but rather, keep cold and dry. Mesclun means a mixture of assorted baby lettuces and greens. Most growers mix 7-10 items in their mix which may include red mustard, frisee, chard, radicchio, red oakleaf lettuce, arugula, mache, mizuna, tat soi, and more. 3lb case