A 1st place winner at the Colorado Medical Marijuana Harvest Cup in 2009 and bred by Denver Relief, Bio Diesel is an almost 50/50 hybrid crossed between Sour Diesel and Sensei Star. Dark green and sometimes purplish buds bring on a heady, spaced-out feeling and ocular pressure, plus couchlock, so Bio Diesel is better for a nighttime strain. Both mental and physical relief are felt from Bio Diesel thanks to its 22 percent THC content.