Abstract: A hermetic plant cultivating apparatus being free-from-irrigation to allow a cultivated plant being disposed inside of the hermetic container for long-term cultivation without necessity of supplying water again. The way is mainly by means of laying the soil layer at the undermost inside of a transparent hermetic cultivating container being pervious to light, and to top-cover a turf layer above such soil layer, then to root the cultivated plant into such soil layer and such turf layer. The adequate water quantity first supplied at the start in such cultivating container can be recycling used as the vapor created by the sun irradiation being kept inside without diffusion or drain. And, the oxygen carried in such water can be fed to such cultivated plant. Thus, the expected effect of being free-from-irrigation in long-term during cultivating term can be achieved, so that having inestimable industrial application value.