Bamboozled

Gardening by the Yard : Episode GBY-303 -- More Projects »
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Chances are you can find a bamboo species that will do fine in your garden, no matter where you garden.
Bamboos are beautiful plants, but few people add them to their landscape. Many gardeners believe that all bamboo spreads like wildfire, but that's not true: only some bamboos are invasive. Many people also think that bamboos die when the temperature drops below freezing, which isn't true. A number of bamboos are native to mountainous regions of China, where temperatures regularly drop below zero.

Another false assumption is that all bamboos are tall. Although we're perhaps most familiar with bamboos that tower over our heads and our houses, bamboos range in height from 18 inches or so to several stories tall.

Many varieties of bamboo are available, including those that run and those that grow in clumps. Some bamboos have wide leaves; others have narrow ones.

The culm is a bamboo's main stem or trunk, which is usually hollow except at the nodes (figure A), the points from which lateral branches emerge. A rhizome is a horizontal creeping stem on or just under the ground (figure B), from which new shoots arise (figure C) and roots descend. In the case of running bamboos, rhizomes may spread considerable distances from the mother plant; this isn't the case with clumping bamboos.
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Figure A
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Figure B
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Figure C
Bamboos are remarkably easy to grow, and although they prefer a sandy loam, they tolerate a wide range of soil conditions, including heavy clay. Like most plants, they like a good, deep soaking once a week, and they like two feedings a year: a heavy nitrogen feeding in early spring and a balanced fertilizer in the fall.

The tall running varieties make beautiful living fences or privacy hedges. Space plants roughly five feet apart, and in about three years you'll have a wall of bamboo. Tall clumping bamboos make excellent specimen plants, whether planted in the ground or in pots. Dwarf bamboos, many of which tolerate part to full shade, make attractive groundcovers, and they may be just the ticket in spots where you've had difficulty getting anything else to grow.

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There's no doubt about it, though: running bamboo can take over an area if left to its own devices. The drain pipe in (figure D) has been cracked and disfigured by super strong bamboo roots. If you're putting in a new planting of a running bamboo and you want to keep its growth in check, dig a two-foot (minimum) trench around the planting area, and install a barrier of 30-mm plastic. It's like planting bamboo in its own pot. Make sure you dig the trench before planting; in an established stand, the roots and rhizomes are extremely difficult to cut.

The minimum depth for a trench is two feet, and digging it is a task you'll want to complete before you plant. Once a stand of bamboo is established, the rhizomes and roots are extremely tough and difficult to cut. Because bamboo's amazingly thick mass of roots bind the soil so effectively, these plants are terrific for controlling erosion on steep slopes or hillsides.

Bamboos are bothered by relatively few insect pests. In the South aphids may be a problem, and gardeners on the West Coast and in the Pacific Northwest may detect bamboo mites. Both are easy to control with a strong blast of water from the hose or with applications of horticultural oil.

If you take care of your bamboo, you'll be rewarded for years to come. Most plants mature in 60 to 120 years, then flower and die.

Keep in mind that bamboo offers yet another bonus in the form of wood, which grows much faster than that of regular trees. Bamboo lumber may be used to build all kinds of neat structures.

Resources
American Bamboo Society
American Bamboo Society
750 Krumkill Rd.
Albany, NY 12203-5976
USA
Phone: 518-458-7618
Fax: 518-458-7625
Email: membership@americanbamboo.org
URL: www.bamboo.org/abs/

Bamboo Gardens of Washington
Bamboo Gardens of Washington, Inc.
501 6th 192nd Place, NE
Redmond, WA 98053-4602
Phone: 425-868-5166
Fax: 425-868-5360
Guests
Mary Peterson
Bamboo Expert, Bamboo Gardens of Washington, Inc.
5016-192nd Place, NE
Redmond, WA 98053-4602
Phone: 425-868-5166
Fax: 425-868-5360
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