Outdoor cannabis seeds are those that perform the best outdoors. Since they are introduced to sunlight, they thrive and grow to monstrous heights and produce high yields. Artificial lights can also grow good cannabis strains, but nothing can even come close to natural sunlight that constantly aids in photosynthesis. Naturally, the yields produced extend above 1 to 2 kilos of pure marijuana once they complete their cycle. For photoperiod plants, the light cycle plays an important role, and you can plant them only when the days are longer and nights are shorter.