To me any plant can go into a Sea of Green , auto's are good for this because you don't need big pots and you can cram alot of 3 gallon pots in a room or a tent. Now with this being said its a matter of preference really which auto do you wanna grow a Sea of Green of ? What suits your fancy type thing . For me if I was going to do a good quality bud and high yielding plant for an auto I would choose a cookies strain or a gorilla strain , both of these are known for high yielding genetics . I might also add when selecting a strain take into consideration your height space , you may wanna go with sativa doms if you have lots of room or if you only have a little height room you may wanna consider indica doms . I personally never done a sea of green because I can only do 4 at a time for now but to see a sea of green of some gorilla or some cookies would be wild and you would get a nice yield with potent nice tasting flowers . I hope this information answers your question in that its a preference thing as all autos can be Sea of Green'd , Happy Growing !