Cat grass is pretty easy to grow, especially for someone who can even kill a cactus. However, this seed mix from Thunder Acres, is just phenomenal. The grass grows so much faster, greener and lusher than other cat grasses that I’ve grown. I also purchased a kit with the planters and the soil, seen in the pic. Oh yeah, and the cats love it. I will find them sitting on the windowsill munching on the grass.