I grew Nevil's G13 in 1985-86 and would like to relay a funny story. First off, I believe the things currently around today only are a small % of true G13. The original had thick, rubbery leaves and grew a BIG center cola. They finished in about 60-63 days, didin't put off too much odor, and finished between 4-5 ft when flowered at 20-22 inches. Weight was very good, I avg. 3 oz. per 3 gallon pot. Anyway, I had one ugly female that looked likesome strange mutant pot plant which I didn't even harvest with the rest of the room cause I didn't think I could sell it. I put it in a dark closet for 8 days and eventually got back to it- then cut and dried it. I refused to smoke it but it was sold to some local desparado's who, to this day, still talk about this "ONE" plant- it remains the strongest smoke they ever had. Bottom line- potent stuff, easy to grow, high yield back then but who knows what your getting in todays hybrids???