Ultra Sour strain is an incredibly potent and rare sativa dominant hybrid — a cross between East Coast Sour Diesel an MK Ultra. This impressive combo delivers an uplifting and invigorating effect, making it the perfect go-to strain for early morning or daytime use. As Ultra Sour typically offers a boost in energy and mental resiliency, people who struggle with ailments such as fatigue, stress or depression find that they’re able to function with a much clearer mindset after using. So if you’re looking for a quality high that will get you fired up for the day, then look no further than this potent strain.