Edibles stay in your system for the same amount of time as smoked marijuana. Up to 30 days in urine, 90 days in hair follicles, 48 hours in blood, and 4 weeks in saliva. If you have edibles once a week or less, the detection window is shorter, 3-4 days in urine, 4 hours in blood, and one day in saliva. The detection window for hair follicles doesn’t change as much depending on the frequency of use.