In the realm of sustainable landscaping, bamboo emerged as a star player. Known for its rapid growth, versatility, and eco-friendly properties, bamboo become an increasingly popular choice for homeowners and garden designers looking to create beautiful, sustainable spaces. However recently it has been in the press, not for these reasons, but due to its aggressive growth turning it into an invasive nuisance. Dubbing it the ‘new knotweed’. However, you can still use this beautiful and versatile plant, as you can keep bamboo contained and prevent it from overrunning your garden and home. Here are some effective strategies to do this;
1. Choose Clumping Bamboo Varieties
When planning to plant bamboo, opt for clumping varieties rather than running ones. Clumping bamboo grows in tight clusters and spreads much more slowly than running bamboo, making it easier to manage and contain.
2. Install a Bamboo Barrier
One of the most effective ways to prevent bamboo from spreading is by installing a physical barrier. Here’s how you can do it:
♦ Dig a Trench: Dig a trench around the area where you want to contain the bamboo. The trench should be
at least 2-3 feet deep to accommodate the barrier.
♦ Install the Barrier: Use a high-density polyethylene (HDPE) barrier or a thick, durable plastic barrier, at
least 30-36 inches wide. Place the barrier vertically in the trench, ensuring that the top edge protrudes a few
inches above the ground to prevent rhizomes from jumping over it.
♦ Secure the Barrier: Overlap the ends of the barrier by several inches and seal them with a waterproof tape
or adhesive to ensure there are no gaps.
♦ Backfill the Trench: Refill the trench with soil, packing it firmly against the barrier to hold it in place.
3. Regular Maintenance
Even with a barrier in place, it’s important to regularly inspect and maintain your bamboo to prevent it from spreading. Here’s what you can do:
♦ Monitor Rhizomes: Check the perimeter of the barrier periodically to ensure no rhizomes are escaping. If you find any, cut them back immediately.
♦ Prune and Thin: Regularly prune and thin your bamboo clumps to keep them manageable. Remove any dead or damaged canes to promote healthy growth.
♦ Trim Shoots: During the growing season, trim any new shoots that appear outside the desired area to keep the bamboo contained.
4. Root Pruning
Root pruning is another effective method to control bamboo spread. Use a sharp spade or garden fork to sever the rhizomes along the perimeter of the bamboo planting area. This should be done at least once a year, preferably in late summer or early autumn, to disrupt the rhizome growth and prevent the bamboo from spreading.
5. Containment Planters
Planting bamboo in large, sturdy containers or planters is a great way to enjoy its beauty without the risk of invasion. Ensure the containers are deep enough to accommodate the root system and prevent them from tipping over. Place the containers on a solid surface like concrete or gravel to further prevent rhizomes from escaping.
6. Chemical Control
If bamboo has already invaded your garden, chemical control may be necessary. Use a glyphosate-based herbicide, applying it directly to the leaves and new shoots. Be cautious when using herbicides, as they can also harm desirable plants. Always follow the manufacturer’s instructions for safe and effective use.
7. Removal of Existing Bamboo
If bamboo has already taken over, removing it can be a challenging but necessary step. Here’s how:
♦ Cut Down Canes: Cut the bamboo canes as close to the ground as possible.
♦ Dig Up Rhizomes: Dig up the rhizomes and roots, ensuring you remove all fragments to prevent regrowth. This may require several passes over a few months to ensure complete removal.
♦ Monitor Regrowth: Keep an eye on the area for any signs of regrowth and remove any new shoots promptly.
By choosing the right bamboo varieties, and using these strategies, you can keep bamboo under control and prevent it from taking over your garden and home.
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