Generally, the seed bank or the dispensary from where you are buying your hybrid weed will notify you on what kind of weed you are going to get and which is the dominant strain. If you still don’t know it for some reason, smoking the weed and the kind of effect it has on you will help you know better. If you are getting a stronger ‘head high’ then you are smoking a sativa dominant strain of weed while if you are getting a stronger ‘body high’ then you’re probably smoking an indica dominant strain of hybrid weed.