When the seeds have gone through the germination stage for about three to five days, a white root will start to grow from the seed. Once the seed is planted, this root is called the taproot, otherwise known as the main root, where other rootlets sprout, forming almost a pyramid-like structure. The cannabis plant’s taproot usually grows vertically and the offshoots horizontally. These other rootlets are critical to the cannabis plant anatomy as the roots absorb the nutrients and the water that feeds the plant and allows it to grow.