Hand washing and line drying in the shade is highly recommended, but if you MUST machine wash, wash on gentle cycle (due to the embroidery and natural colors) in cool water with like colors, no bleach, tumble or hang dry.
Botanical dyes are not as colorfast as chemical dyes. If you use oxygen cleaners or harsh detergents, they will fade more quickly. This does not hurt the fabric. For best result use pH neutral detergents.