Trainwreck is a 90% Sativa dominate Hybrid which is unclear exactly where it came from. I've read it being created in the 70s and then in the 80s. Some say this marijuana strain was originated in Humboldt, Ca and others say Arcata, Ca. "They" say, 2 brothers were growing this strain outdoors when a trainwreck occured and they wanted to pull the plants before being discovered. Whomever and whenever, this is a very popular strain amoungst the marijuana smoking community. THC % is around mid teens..like 15%. This strain is a creeper so if you're not an every day smoker, less is more. Trainwreck is better to be grown indoors and completes it's flowering around 8-9 weeks and mid Oct for outdoor grows. You're looking at about 70grams per plant. The smell is pungent and piney. Great for MS, depression and mussle aches.