They look great to me. I can't really help ya' out here other than to say they look like they are doing fine but need several more weeks to fill in/out? I do have some questions for you because I plan on growing a hawaiian snow and a couple of other predominantly sativas my next grow. How long did you veg them? What kind of light are you using? How tall did they get? What size pots you using? That is soil I see? Yes? I am stoked about smoking some sativa again.
When you say several how many for the BB I was hoping 2 and 4 for the HS,They were roughly 8-10 inches when I flowered but fuck me did that HS stretch actually that is why the reflector is so high If I lower it the 2 colas of the HS will be hitting the roof of the reflector so i will have to higher the BB up to the light
,I started them in 6 inch pots than replanted into 10 inch pots ,potting soil to start with blood,meal and bone mixed thru then when repotting used MG but i have since read its not good but i don't notice anything but i have no experience to go on
A bit of leaf burn from the lights but other than that looking healthy 
mine didn't look that good at 3 weeks thats why I'm feeling that my buds are small ,I'm thinking the problem was that I vegged under 24/0 and went straight to 12/12 and the girls took longer to start to flower so this is a lesson learned 
