i do not no if many people have grown at such alltitudes on the eqador i made a cross thats growing at 4000 meters its a purple corrintinia x a old kush,, i was lucky enough to meet some incas growing and studying highland medicina plants they gave me a place i tried al different varietys up there the purple columbian x kush survived and didnt mold its some very nice urbs i left my friends seeds of the plant and alittle knowledge to keep growing them the have added this plant to there other highland medicinal plants