Wheatgrass contains various minerals, amino acids and vitamins, making it a very nutritious means for removing toxins as well as a decorative addition to your indoor garden. Wheatgrass can be used in a variety of ways, including poultices, tea and juice. The blades grow quickly and can be harvested within seven to 10 days. The plant does not need a lot of sunlight but requires careful heat and moisture maintenance to produce a healthy plant.