Sonia Uyterhoeven is the NYBG’s Gardener for Public Education.

Last week we were discussing vertical gardens, or “living walls,” a specialty of French botanist Dr. Patrick Blanc. Since we are now in the midst of our spring Orchid Show, today we will explore why orchids are such good candidates for vertical gardening. With somewhere in the area of 70% of all orchids being epiphytic, members of the Orchidaceae family were destined to climb.

Orchids that dangle in the air–sometimes known colloquially as air plants–are classified as epiphytes. Epi- means “on top” and -phyte means “plant”–essentially growing on top of another plant. The relation the epiphyte has with the host is not parasitic (where it is harming the host), nor is it symbiotic/mutualistic (where both parties benefit), but rather commensalistic (where one benefits and the other is neutral). The term commensalism is derived from the Latin meaning “sharing a table.”
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February 6, 2012; Isla Londonderry, Bahía Isabel, approximately 54º59′S, 70º52′W

The engines started early this morning, and shortly afterward we hit rough seas. Those who had stayed up late had been warned. I was not amongst them, but fortunately, I found it a pleasant surprise. When we came out onto the deck we were in a secluded harbor, surrounded by snow-covered peaks. In short order the sleet started up again, and in no time at all, it was accumulating on the deck. I guess it is a bit colder than usual, but I haven’t noticed that.

Laura standing on the sleet-covered deck

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Meet Thomas Christopher, an expert on sustainable gardening practices, who will speak about “The Backyard Revolution” Thursday, March 15, 10 a.m. to 12 p.m.

Thomas Christopher has been covering sustainable gardening practices as a writer and editor for more than 25 years, with articles in nationally-read publications including The New York Times and Martha Stewart Living. He is also a hands-on gardener who has started his own sustainable lawn consulting business, Greener Grasses/Sustainable Lawns, near Middletown, CT.

“I was staggered to learn the area of turf in the United States is as big as Virginia, Connecticut and two-thirds of Rhode Island. Grass is our largest irrigated crop, more than corn,” said Christopher in a recent Chicago Tribune article. “Grasses are a resource-soaking nightmare, but they don’t have to be.”
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Outside, the chill factor is dawdling somewhere around “I can still see my breath.” Step into the Conservatory, however, and you’ll find yourself closer to the equator. The Orchid Show is our little slice of summer in the tropics.

Photo by Ivo M. Vermeulen