cannabis is not native to a large range of the area it is illegally grown in. In its native habitat it has an infrared color much like that of other herbaceous plants in the area. In higher latitudes a cannabis plant sticks out like a sore thumb. I know all about this stuff, because i work with satellite photos.. We take an infrared satellite image and assign the wavelengths of infrared light, visible colors. Just as cannabis has a bright green distinctive color in the visible spectrum it also gives off a unique color of infrared light.