Outdoor refers to weed that is grown outdoors using sunlight. This is compared to weed that is grown indoors using lights. Outdoor weed is considered closer to farming traditions that date back decades. It is also considered more environmentally friendly and sustainable because it doesn’t use electricity. Outdoor weed is said to be richer in terpenes, giving fuller effects and a great taste. Weed grown outdoors results in middle-level THC percentages, making it less potent. For that reason, it is usually less expensive.