i grow a nirvana new purple power indoors and im pretty sure it was an outdoor. but it grew really tall about 5-6' and just wouldnt stop. seemed like no matter how close the light was it would stretch. i dont thikn it really stopped till like the 7th week of flowering. got a total dry weight of like 200 grams dry weight. but it started out on a 60 watt houselight, to a 150 watt MH to a 300 watt HPS. stalk got no thicker than a sharpie marker but that was my fault. :/

it was just me and my setup.. but im gunna say flower pretty early and they will triple their height no prob. (again i dont know if this applies to all strains and whether it was indoor/outdoor)