“They’re known to grow above the 14,000-foot level on mountains in Colorado and as far north as Canada’s Northwest Territories,” Calhoun said. “There’s a great diversity of cold-hardy cactus to be had.”
Cacti are succulents, native to the New World. Approximately 250 of the recognized 3,000 species are found in North America.
If you’re going to plant cacti, put temperature-tested plants, cuttings or seeds – preferably those native to your area – in places with Southern exposures, if possible. Give them at least six hours of sun per day.
Provide a bed of 8 to 12 inches of sandy soil, supplemented by granite or gravel mulch. Be stingy about watering, particularly in autumn when the plants are evaporating away any surplus moisture.
“Once cacti are established, they don’t need any extra watering and only a little supplemental watering when it’s extremely hot and dry,” said David Salman, founder and chief horticulturist for High Country Gardens, an online and mail-order company in Santa Fe, N.M. “I do give them some organic fertilizers – particularly if I’m trying to optimize their flowering and accelerate their growth. Cacti don’t react well to chemicals that people commonly use throughout their landscapes.”
Calhoun also recommends integrating cacti with other plants. “That’s the way they grow in nature,” he said.
Cacti may be stuck with a prickly reputation, but there are spineless, scented and edible varieties, he said: “The hardy Beehive has fragrant flowers followed by edible fruit that tastes like strawberries.”
Cactus is the clever gardener’s alternative, said Richard Ward, owner of The Dry Garden Nursery in Oakland, Calif.
“Water loving plants (like roses) are the dinosaurs of the past,” Ward said. “They’re like gas-guzzlers on the road. People are pretty much going for water-wise gardens they can install and pretty much forget about.”
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Online:For more about landscaping with cacti, see the University of Rhode Island Landscape Horticulture Program: http://www.uri.edu/ce/factsheets/sheets/cacti.html
You can contact Dean Fosdick at deanfosdick(at)netscape.net
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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