If i hardly smoke weed an the last two weeks ive been smoking but i stopped. how long will it stay in my system n hair?

Can vary: There are many variables that control the answer to the question. The active ingredient of weed is lipophilic, meaning it attaches to fat tissue and can stay in the system for a while. It would stay longer in a large person and less so in a thin person. Also if you have been smoking large amounts for a long time there would be more build-up. 1-2 weeks in urine, longer in the hair.

Not just 2 weeks?: If you are a regular weed consumer( before the last 2 weeks) you will have THC accumulation in your hair follicles.

"Weed": Single use of marijuana should be out of your urine in 1 to 7 days. Regular use of marijuana – should be out of urine in 7 to 100 days. Single use marijuana can be detected 12 to 24 hours in blood. Regular use marijuana can be detected for 2 to 7 days in blood. Marijuana regular use detected in hair for months. Single use might not be picked up in hair.

Months at least.: It'll stay in your hair and fat deposits under your skin for months.