Rainbow Swiss Chard ( beta vulgaris l. Var cicla) seeds. Chard is a superfood, high in vitamins A, C, and K, antioxidants, iron, calcium, magnesium, brain and heart health. 
Swiss chard is very easy to grow, incredibly hardy, and a great choice for beginner gardeners. And it looks beautiful in the garden, with broad, thick stems available in colors ranging from pure white to golden yellow and even hot pink.
Direct sow in spring, soak seeds before for better germination. Or start seeds indoors 3-4 weeks before last frost.  Annual, open pollinated, 56 days 
Typically grown as a cool-season crop because it grows quickly and easily during the cooler temperatures of spring and fall, chard is quite tolerant of hotter temperatures, too. Its growth will slow down in summer, but chard’s higher heat tolerance makes it a great salad green to grow when it gets too hot out for the others.