Yes they are all sativa strains. Most have long bloom times and yes you can get them from seed banks. You can also get them through people on this site too.
Strains like Transkei, Durban Poison, Malawi gold, red Congolese from Africa. Vietnamese DeLat. Thai strains I know less of but they grow in hot humid conditions, like purple thai, chocolate Thai. Hawaiian strains such as maui wowie and kona gold, Mexican strains such as Acapulco gold, Oaxaca gold. Also haze strains grow well in hot humid areas
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