im growin ata tundra which is a cross from a landrace strain from the matanuska valley and a landrace kazakstani. It says its good in cold climates. Im gonna leave one on my window sill overnight to see how it affects the plant i got 2 flowering females and the aroma from the plants are lovely each plant has its own unique scent. The original thunderfuck was tested for thc content and it was around 32%. Supposedly the strongest strain known to man i did not know that to get max potency that it would have to endure some frost i hope it works im gonna give it a go