Sativa and indica are the two main species of cannabis with sativa being the stronger of the two. Indica is commonly used to make hash and stronger grasses such as skunk, and sativa was traditionally used to make rope and fibers as well as being used recreationally and for medicinal use. One of the differences between the two is the size the plants can grow to. Indica plants usually grow to about 6 foot high, whereas the sativa plants can grow as tall as 25 feet. However sativa plants are usually between 8 and 12 feet tall. In places where weed seeds are grown, they normally find that the sativa leaves are smaller and thinner than indica leaves.