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You Should Be Eating Japanese Knotweed

 

At this time of year, we hear a lot about foraging and eating wild foods. Folks get excited about the first green sprouts out of the ground and they go a little nuts.

So nuts, in fact, that foraging for things like wild leeks (also called ramps) and fiddleheads is becoming a problem. People are wiping woodlands clean and mucking up the area while they’re at it. It’s one of the reasons we’re constantly preaching sustainable foraging.

One of the best options for foraging fiends concerned about our fragile ecosystem is to forage for abundant, invasive species like garlic mustard, daylilies or our current favourite, Japanese knotweed.


It’s also one of the safest things to forage right now because it’s likely growing in the alley/driveway/parkette near your house – which means it doesn’t require you to go very far or travel to more vulnerable parts of our province.


Japanese knotweed has a rather infamous reputation. Look through the online literature, and you’ll see it described as thuggish, ferocious, rapacious, and an “indestructible scourge.” It’s currently wreaking havoc on our wetlands and gullies.

This ‘scourge’ is particularly difficult to control. It has really a wide-ranging root system, which can extend up to 3m in depth and 7m in all directions. Sure, the industrious person could dig it all up, but it regenerates in full if even a bit of the root system is left intact.

Despite its bad rap, Japanese Knotweed is a great source of flavour. After all, eating it is a great way to curtail its spread, but for those unfamiliar with this plant, that can be intimidating.

To begin with, not all parts of the plant are edible (as with rhubarb) and they are only edible at a certain time of the year. The shoots are what you’re looking for, but they have to be gathered before the stems become hard and woody. The ideal time to eat knotweed is mid-April to May.

This beautiful charred knotweed dish was served up at Canis – one of 30 Feast On Certified restaurants in Toronto – in 2019.

Japanese knotweed shoots can be eaten raw and have a lovely sour taste similar to rhubarb. Ideally, though, you’d cook them in a similar fashion. Think knotweed and strawberry pie, vanilla knotweed reserves or even a knotweed shrub for cocktails. We’ve even come across creative uses like this knotweed hummus.


For more on foraging in Ontario, follow our favourite foragers on Instagram!