I've been living in Thailand for 20 years. If you buy weed off the street, you will get a quantity of stems, leaves, flowers and seed. Most commercial Thai weed is grown outdoors pretty much naturally. It is a 100% Sativa. A previous poster was correct, it grows very tall, slender but cab produce very decent yields when grown "properly". What you buy off the street is very deficient in THC concentration because most females go to seed and produce little flowers. The growers don't care about quality, they care about getting the harvest out for sale. You get a buzz, but it is shitty and only because local producers mix in all the males and females that have gone to seed. Unless you grow it yourself, you will not get Sensimillia (seedless), you will get shit with pesticides (nam-yaa) and all kinds of impurities.
HOWEVER - if you cultivate local Thai weed (from germination to peak harvest, removing all males when sexing), it will knock the shit out of you!! A soaring psychedelic high like what some of you may remember from the 60s, early 70s. These are the same Phenotypes from whence Thai Stick came, and that was and still is killer shit.
So for those of you living in Thailand. Buy a small bag from your local dealer, take the seeds, germinate them and use best practices cannabis horticulture to grow the most rip shit weed you will ever smoke. Very simple. I need to grow some good pure Indica along side to bring me down.