Some friends asked me how to grow wheat grass (cat grass) for their birds. The method of planting wheatgrass is actually very simple, no matter by water or soil. I am going to introduce you the water-planting (hydroponics) method. I like water-planting because it is much more easier and convenient than soil-planting. You can even have harvest in just a few days. Growing your own wheatgrass is healthier for your birds because the grass is fresh and grown without chemicals. Wheatgrass seeds can be found in the shops/places where are selling plants.