Durban Poison is a Sativa and it has a huge yield and the smoke will knock you on your ass. Not all Sativa's are shitty, stringy, and useless. The early Sativa's are not bad if you ask me. Indica's are good, they are less trippy and more like a narcotic or something. Indica's grow quickly and they are very bushy and dense and the buds are very big and full. Sativa's grow quickly sometimes depending on the strain but for the most part they are a slow growing plant. And Indica will finish months before a Sativa usually. There are the odd exceptions. (fast growing Sativa's) So basically if you want something to grow outdoors up north in Canada or Poland or New York State or somewhere northern, choose an Indica over a Sativa unless it is an early finishing type of Sativa. If you are up in northern Saskatchewan or northern British Columbia near the Yukon and Alaska borders, pick a fast finishing indica like a Low Ryder cross or Low Ryder, or something similar. Good luck with your grows everyone