I understand these plants where grown from seeds in a green house, but what makes them so large? They also seem to be bug free, and just healthly. The nuseriey that did these no longer do Residential only whosale. They are in Chicago near my job. They are beautiful.
I'm not sure of they plant that you are referencing.
Professional growers are just that, experts growing plants in optimum conditions.
Enjoy your healthy plant!