30-35 Days. Apple Blossom Swiss Chard baby greens can be grown indoors at any time of year and are a nutrient-packed way to get your “green fix” in the dead of winter. Young leaves are great in salads, steamed, stir-fried, added to lasagna, omelets, soups, and stews, and mixed with other greens. Move containers as needed for best light exposure and temperature. Harvest when 2”‒4” tall and enjoy! Detailed sowing instructions inside packet.