Dutch Seeds Shop White Widow seeds is the most powerful marijuana strain and is named for the abundance of trichomes , resulting in the plant’s whitish tint. It is also one of the more powerful marijuana strains (alongside AK-47 and Afghan Kush) with a mind blowing THC level – 20%-25%. White Widow cannabis seeds are (60%/40%) indica/sativa cross-strain and is most suitable for indoor cultivation. The original cannabis seeds grow as high as 80 cm and the yield reaches 450 gr per m2. The buds have so much THC on them that it is hard to see them at all. White Widow seeds – the backbone of the marijuana seeds industry and one of the most famous marijuana types in modern growing.