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Garden Killing Quackgrass Weed Finds Ally in War on Memorial Garden

Quackgrass - Leathal Enemy of Flower Gardens
Quackgrass – Leathal Enemy of Flower Gardens – Photo Courtesy of the Ohio State University Weed Lab

This is a picture of “quackgrass“. Carleen Libert and I did battle with quackgrass for years. I’ve seen what quackgrass can do to gardens. It kills them by competing for space and nutrients. It weaves its leaves directly into growing plant’s roots and leaf structures, strangling them and competing for sunlight. It is deadly to gardens.

Quackgrass is an invasive weed. It is one of the nastiest invasive weeds known to gardeners and farmers alike and it is currently and vigorously working its way into the flower bedsĀ of the Carleen Libert Memorial Garden. In fact, this weed loves the memorial garden for the same reason the hundreds of flowers and bulbs I have planted love it: the soil is very rich in organic nutrients and is loosely compacted, which allows for root growth and air circulation.

What makes it so bad? Quackgrass grows quickly. It has very deep roots that make it hard to extract. Those same deep roots make it hard to eliminate with ordinary surface chemical treatments. They DON’T WORK. Worst, its rizomes – which can run for 2 or more feet in any direction – must be entirely dug up. If you leave any piece in the ground it will begin growing. The ONLY approach that works is a consistent and thorough eradicaton effort. One that requires a rich yet loosely packed (not compacted) soil that you can dig into and manually – slowly and carefully – follow the roots and pull them out without breaking them. This is the only way, and up until the township insisted on laying on inches of root mulch, the garden was in perfect shape to wage the battle – the next stage in building a garden that could last for decades with minimum care.

I also know what it is like to lose a garden to this weed. Our backyard borders on a field. That field is overgrown with this weed. In just 2 years, while grieving and investing my time in building the memorial garden, have lost an entire flower bed, bordering on this field, to this weed. The ONLY way I will be able to recover this lost flower bed will be to dig up all the soil in the flower bed to a depth of 12 inches, carefully remove every piece of the weeds runners, insert a 12-16 inch physical barrier entirely around the flower bed and thereafter to remain vigilent.

It is at this time in Spring and in the memorial garden’s development that I had the best chance to control and eradicate this enemy to the garden. How? By visual inspection of emerging leaves, digging into the soft composted leaf mulch laden soil, and manually and laboriously pulling up entire root networks. That window of opportunity is rapidly closing.

A garden surrounded by blacktop is not an ideal environment for a garden but it is an ideal environment for fighting quackgrass. It can send out rizomes from adjoining lands but I have yet to read where it can send its roots 20 or 30 feet underneath blacktopped roadways.

Why is a quackgrass so bad?

1. It spreads by rizomes (roots) that bury themselves DEEP into the soil. I’ve pulled up rizomes that was 8-10 inches below the surface.

2. You canNOT kill or eliminate this weed by ordinary means. To eradicate or kill it you have to KILL EVERYHING with chemicals. Everything green must die. Sometimes for more than a year as it is a very persistent weed.

3. The ONLY choice for control in established flower beds is to use the type of composted lead mulch base that I was using which ALLOWS the GARDENER to use “mechanical means” to attack the root network. You see, if you don’t get the entire root then each piece – if you only tear at it and rip it – will create a new network of weeds.

So, by covering the flower beds with root mulch I have been effectively thwarted from utilizing the ONLY effective means of controlling this garden killing weed – tracing the shoots, digging down into the soil (which WAS EASY TO DO until now), and extracting the entire root system and every piece of the roots/rizomes.

For more information about this nastiest of weeds you can read here:

http://apps.rhs.org.uk/advicesearch/profile.aspx?PID=283 (The Brits have a different name for quackgrass, calling it “couchgrass”, but the Royal Horticultural Society certainly knows how to write concisely.)

The USDA / U.S. Department of Agriculture (Which tends to take a “douse it with chemicals and kill everything approach”) http://www.invasivespeciesinfo.gov/plants/quackgrass.shtml