Serious Seeds was founded in 1995. This Amsterdam based company has a select list of seeds. They started out by breeding these weed seeds with quality and not just quantity, and they plan on maintaining that principle to the end. Serious Seeds company breeds marijuana seeds according to superior standards to ensure quality, potency, high germination rate and uniformity of the weed plants. It has been conducting independent researches and tests of selected marijuana strains for over 20 years. This is to be able to produce the strongest and highest containing THC level cannabis in the market which averages from 18% to 22% THC (tetrahydrocannabinol). Every batch of seeds produced is hand selected and tested to guarantee freshness and quality. Serious Seeds is the only marijuana breeder which numbers each cannabis package individually to easily monitor and track each from their warehouse to retailers.
11 out of their 13 strains are cannabis cup winner and the attitude seedbank has all these marijuana seeds for sale on the Attitude Seedbank website.