2016年6月13日月曜日

Gardening: Art of Ecosystem Governance

Controlling weeds is a big challenge for a house owner. I tried two types of pesticides, and yet before powerful vines such as Kudzu, they proved hopeless. I also received a kind advice salt would work, but could not use that method very close to the house using iron structure.

In fact, invincible Kudzu has even traveled to the United States from Japan and has overwhelmed everything including local trees, a colleague told me. Here is an article on its amazing growth.
Last summer I was too busy to go to my second house for nearly two months. In late August I could finally make it, only to find the garden turned a jungle in which vines entangle even my house’s second floor balcony. It was only three months after professional gardeners completely removed weeds.

I got determined I really need to avoid the situation this year before it gets too hot in summer. As discussed, the idea is to create an English garden with gravel and brick paths on anti-weed fabrics.

To that end I did an experiment of a relatively cheap fabric. A few weeks later, the result was it didn’t work – even very tiny weeds penetrated it.

After thorough investigation on anti-weed fabrics, I learned professional exterior designers recommend a DuPont product called Xavan 240BB. Apparently it is made of four types of fabrics durable for ten years and even the powerful types of weeds do not penetrate it.

Speaking of DuPont, I remembered that the key reason why the Montreal Protocol became a successful environmental treaty to control ozone depleting substances is that the company could develop alternative products to them. Xavan 240BB is the most expensive type of weed-control fabrics ($120 for a 1m x 30m roll), but I thought it might be worth trying it.

Two weeks after I used it on gravel and bricks and created a path, I found no weeds on it whatsoever. I hope it will continue for the next decade.
When the garden was full of weeds, bees were frequently flying and creating a nest on the eaves of a cabin. I was at a loss. But after removing the weeds and starting to construct an English garden, somehow the bee nest was empty. Before any bees would come back, I prodded it down with a stick. What a relief...!

A gardener is a governor, I would say. All the living things whether Kudzu or bees in this small ecosystem called a garden is watching her. It is vital to demonstrate the garden is my territory and kick out invaders by taking appropriate actions. At the same time, it is important to use environmentally friendly methods to maintain the healthy ecosystem.