Nirvana's indoor seeds are specifically bred to flourish in grow rooms, artificial or semi-artificial environments. All the elements necessary for growth, like humidity, light and wind, are controlled by the grower. You'll only be able to grow indoor cannabis plants outdoors if the weather conditions are similar to those of a grow room.
In general, indoor cannabis seeds grow into more compact marijuana plants that love stable temperatures. Indoor cannabis plants will achieve their maximum yield in an indoor growing environment.
Indoor cannabis plants usually have higher THC levels than those grown outdoors, as well as a lot of resin packed buds. Moreover, they won't be as vulnerable for pest problems, cause they grow safely in your controlled grow room.