You could grow these Parlor Palms (Chamaedorea elegans) faster in a commercial greenhouse but they would not be healthier than these.
They have been growing in a residential hotel room under the light of one CFL bulb. The key is that they have been given a measured diet of light, water and nutrition growing in "bubble" type sub-irrigated planters (SIPs).
Why doesn't everyone know about SIPs, particularly kids? This is about STEM education more than stems.
An anecdotal comment: A board member of the Park Slope Civic Council in Brooklyn who is a professor and a gardener said to me, "We would not have known about SIPs if you had not told us about them." More - Scroll down to Partnerships
Note that this neighborhood is nearby to the Brooklyn Botanic Garden. More about my insider experiences as an instructor at the BBG is coming up in a later post.
It's also worth noting that Vint Cerf, a Google VP and a father of the Internet does know about SIPs. In this video he dedicates the EarthBox garden at the Googleplex H.Q. The garden grows fresh vegetables for Google employees.
As he mentions in the video, Vint also has personal, hands-on experience with SIPs in his back yard where he and his wife grow fresh veggies in EarthBoxes.
March 1, 2015
July 13, 2015 - about 4 1/2 months later
Prior post about these palms.