Does the seeds are in low-high % variegated or "Zero%"? I also do grow another plant not just weed. In this case most of them are Zero% or very low chance.
Via chlorophyll mutation or the cursed Mosaic viri, the latter the most often seen hence those who grow weed are very cautious, those who know little, often exclaim "Oh how cute"! wiki: Because the variegation is due to the presence of two kinds of plant tissue, propagating the plant must be by a vegetative method of propagation that preserves both types of tissue in relation to each other. https://en.wikipedia.org/wiki/Variegation good luck