Ultra Sour by THSeeds is a cross out of Amsterdam. This breed is the product of crossing MK Ultra and East Coast Sour Diesel, creating a sativa-dominant bud with uplifting stimulation and euphoria. Ultra Sour scents of pine and diesel, and its buds are green with rusty orange pistils. The mental effects that are powerful can be a little daunting for consumers so mind your dosage. Love Ultra Sour as a way to shrug offstress and improve creativity.