Gardening Question of the Day for Sunday, December 9, 2007
What's the best way to prolong the life of my Christmas cactus? (answer).
From The Old Farmer's Almanac.
From The Old Farmer's Almanac.
First published November 29, 2007
Earlier this month, I spent a couple of days attending the annual Green Industry Show and Conference in Edmonton—an event that highlights the latest information and technology pertaining to the world of horticulture. It’s an annual pilgrimage I always look forward to and the kind that’s always enlightening, sometimes frightening and, occasionally, rather amusing. Here’s a peek at the highlights, starting with the enlightening.
Dutch treat
From across the Atlantic, the Dutch are once again proving themselves leaders in the world of greenhouse technology. Currently, their researchers are investigating greenhouse coverings that allow light to pass through (which allows for plant growth), while trapping some of the remaining solar energy to generate electricity. Clearly, the Dutch believe the future of the greenhouse industry lies in treating greenhouses as net providers of energy that can act as giant solar panels. This technology is still a few years down the road, but the idea of greenhouses as electricity generators is nothing short of fascinating.
Scary business
I sat through a seminar called “Pests of Concern for Nursery and Greenhouse” that featured a litany of pests threatening horticulture in Canada. Two particularly worrisome culprits earning the honour of being singled out were the emerald ash borer and the Asian longhorn beetle. These two impressive and extremely destructive pests have made names for themselves by tunneling through and destroying thousands of trees in the eastern U.S. and in Canada. Of the two pests, the emerald ash borer has proven to be the more discriminating eater, restricting its palate to ash trees; whereas the Asian longhorned beetle enjoys a less restrictive diet and consumes a wide variety of hardwood trees. To date, neither has hitchhiked its way into the prairies or B.C, but one can’t help but wonder if their western trek is inevitable. It is possible, but if we’re smart and don’t move pest-infested firewood around the country, we just might escape their wrath. I must admit, however, it’s the “smart” part of the human equation that scares me.
Right after the borer and beetle session, I attended Dr. Ken Fry’s seminar, “Environmentally Sustainable Pest Management.” To make things interesting, Dr. Fry linked his microscope to a projector so we could view some insect pests and predators on the big screen. A few attendees seemed a little squeamish when the metre-long bugs began inching across the screen, but I can attest that anyone who averted their eyes definitely missed out on a great show—particularly when a gigantic foxglove aphid decided for some inexplicable reason to flip on its back, with all six of its legs flailing. Now, that might not seem like a strange thing, but had this been a horror movie, it would be equivalent to the scene where the teenager (who has, of course, just stepped out of the shower) hears a strange noise and tiptoes outside to investigate. You just know its not going to end well. Now, Dr. Fry didn’t provide a scientific explanation for why the aphid decided to stretch out, but it was certainly made quick work of by the predaceous insects that entered stage right. Pass the popcorn.
Last but not least
I think any good conference should come with at least one good laugh, and this conference delivered. The year’s source of amusement was a video demonstration of a piece of equipment called the Rodenator. For lack of a better description, the Rodenator is a two-metre-long critter cannon. Wait; it gets worse. This contraption earned its name because the business end of it shoots a gaseous mixture of propane and oxygen down gopher holes and permeates an unsuspecting rodent’s labyrinth of tunnels. The mixture is then—ignited!— and the resulting shock wave “eliminates” the pest problem within seconds. The video that I watched (with one hand clasped over my mouth), shows a helmeted employee literally blowing up varmint burrows in a manner that would make Yosemite Sam proud. Blowing up animals in your yard? What’s up with that, Doc?
Needless to say, the Green Industry Show delivered the goods once again, and I contentedly left the conference centre feeling a mixture of emotions—a bit of trepidation about exotic pests, a little more enlightened about horticulture, and last but not least, overwhelmed with desire to watch Caddyshack. Not a bad work week if you can get it.
“Let us be grateful to people who make us happy; they are the charming gardeners who make our souls blossom.”
Marcel Proust (1871 – 1922)
My last sight of Mom was the day I pulled away from the parking lot of the adult independent living community where she died within the month. I could see her on the balcony of their third floor apartment, built on the site where my public school kindergarten once stood. She waved goodbye with one hand, and held a watering can in the other. She was on her way to water the small herb gardens she nurtured in window boxes outside neighboring apartments. 








When it's time to trim the tree, look to garden centers for the unique and unusual. Gardeners and seafarers alike, will be especially interested in the above collection... insects, butterflies, birds, sailing ships, crabs and lobsters are just some of the more original exhibits in this trim-a-tree section. Adding an extra special ornament or two, each season, is a fine way to create warm family memories and new traditions.