20 Delicious #JapaneseKnotweed Recipes for Spring

December 28, 2024

"Spring is here, and so is Japanese knotweed—that tart, rhubarb-like invader begging to be turned into something delicious! Whether you’re a forager or just curious about this seasonal ingredient, we’ve rounded up 20 creative ways to use it, from tangy jams to savory stir-fries. Ready to give this versatile plant a spot on your plate? Let’s dive into these mouthwatering recipes!"

https://simplyfamilyrecipes.com/japanese-knotweed-recipes/

#SolarPunkSunday #WildEdibles #InvasiveSpecies #Foraging #FallopiaJaponica #Recipes

Meet the Massively Destructive Garden Weed That ‘Tastes Like Rain’

Gardeners hate it. Chefs love it. And now you need to get your hands on it.

By Marguerite Preston
May 31, 2016

Excerpt: "Eddy Leroux, who was Wong’s first client and co-author of her book, #ForagedFlavor. 'First, I just bit into it straight,' Oliveira says, 'and I fell in love with the taste.' To her, it’s like rhubarb, but 'more earthy. It tastes like rain.' Knotweed is the 'gamey' version of rhubarb, she says, so she combines both in her desserts, letting the knotweed enhance the flavor of the rhubarb.

"The two meld in a hibiscus-tinted compote, a jam at the center of a rolled almond cake, and a rosy quenelle of ice cream. You wouldn’t know the difference from a very good rhubarb dessert were it not for the little rings of confit knotweed, still crunchy, resting atop the center mound of riesling sabayon.

"Another one of Wong’s clients, chef Amanda Cohen, takes an entirely different approach to the sour weed. Though she’s put onion in a chocolate tart and turned lettuce into sorbet at her innovative vegetarian restaurant Dirt Candy, she prefers to keep knotweed on the savory side of her kitchen. 'Rhubarb has sweetness to it, knotweed doesn’t,' she says, 'It’s just sour on sour.' So she pickles it in a simple mixture of water, vinegar, and salt, and scatters the tiny ring-shaped slivers over her 'forager’s salad.' They add a sour zip to the tangle of other wild plants and flowers Wong supplies each week, which Cohen arranges with very little other adornment over cubes of soft, pungent cheese.

"That versatility is part of knotweed’s appeal. Matt Louis, the chef and owner of Moxy in #PortsmouthNH, says that in the three years he’s had knotweed on the menu, he’s often made pickles or chutney to go with meat or fish, but one of his favorite uses is in pie. He swaps it for rhubarb in strawberry-rhubarb pie, explaining: “Whenever I’m using anything like knotweed or other lesser-known foraged items, I want to put them in dishes that people can relate to. That pie is something people can embrace.' "

Read more:
https://www.bonappetit.com/test-kitchen/ingredients/article/japanese-knotweed-recipes

Archived version:
https://archive.ph/Fj0ol

Link to Foraged Flavor book:
https://www.amazon.com/Foraged-Flavor-Fabulous-Ingredients-Backyard/dp/030795661X

#SolarPunkSunday #InvasiveSpecies
#WildEdibles #Foraging #FallopiaJaponica

Eating #JapaneseKnotweed: Safety, Recipes & ID Guide

2025-08-17

The Basics: Eating Japanese Knotweed Safely

"Before you grab your harvesting basket, let’s cover the foundational knowledge. Getting these basics right is the key to a safe and tasty foraging experience. It’s all about what you eat, what it tastes like, and most importantly, when you eat it.
What parts of Japanese knotweed are edible?

"The only parts you should eat are the new, young shoots that appear in the spring. You’re looking for stems that are tender enough to be snapped easily with your fingers, much like fresh asparagus. These shoots should ideally be between 6 to 12 inches (15-30 cm) tall.

"As the plant matures, the stems become tough, woody, and fibrous, making them unpalatable. The leaves and flowers are not typically consumed. Always peel the outer skin of the shoots, as it can be a bit tough, and only use the inner core. The inside is hollow, which is a key identifying feature.

What does Japanese knotweed taste like?

"The flavor profile of young Japanese knotweed is one of its most pleasant surprises. It has a distinctively tart, tangy, and refreshing taste that is remarkably similar to rhubarb, but perhaps a bit more 'green' or 'lemony.' Some people also detect earthy notes, similar to asparagus or sorrel.

"Because of this similarity, it’s an excellent substitute for rhubarb in most recipes. It cooks down into a soft, pulpy texture, perfect for both sweet and savory dishes. I once made a knotweed and strawberry crumble for friends who were skeptical, and they couldn’t tell the difference from a classic rhubarb version!

When is the best time to harvest Japanese knotweed?

"Timing is everything. The harvesting window for edible Japanese knotweed is quite short, typically lasting from mid-April to late May in most North American and European climates. The key is to catch the shoots when they are young and tender.

"Here’s what to look for:

Height: Aim for shoots under 1 foot (30 cm) tall.
Texture: They should be crisp and snap easily. If you have to saw at it with a knife, it’s too old and will be unpleasantly woody.
Appearance: The young shoots are often reddish-purple and speckled, resembling asparagus spears.

"Once the plant grows taller and its distinctive heart-shaped leaves begin to unfurl, the stalks quickly become tough and fibrous. Harvesting too late will result in a stringy, unpleasant meal."

Read more [includes poisonous lookalikes and recipe ideas]:
https://flavor365.com/eating-japanese-knotweed-safety-recipes-id-guide/

#SolarPunkSunday #InvasiveSpecies #WildEdibles #Foraging #FallopiaJaponica

#JapaneseKnotweed: an invasive plant's potential for innovation

Classified as an Invasive Alien Species (#IAS), Japanese knotweed is renowned for undermining ecosystems. But some researchers, designers and architects are approaching the tenacious Asian perennial as a resource to create new material solutions for fine crafts, but also for industry. Formes de Luxe shines a light on four makers that are turning this ‘nuisance’ plant into an opportunity.

Christel Trinquier
Published on 01/08/2024

Excerpt: "Inspiring bio-concrete

In the UK, architect Irene Roca Moracia and designer Brigitte Kock (both graduates of Central Saint Martins) have also seized on the potential of invasive knotweed to create what they dub 'bio-concrete'. The material, developed as part of the LVMH Group's Maison/0 program for regenerative luxury, is inspired by the cement made in ancient Rome. Except that in this case, knotweed replaces wood ash and/or volcanic ash. Once incinerated, it is mixed with water and the shells of American signal crayfish - another invasive species in Europe threatening native fauna. The material is then poured into molds to obtain the desired shape.

"No heat treatment is needed as hardening takes place in the open air and no pigments are added either: the final textures and shades depend on factors including the proportions of ingredients in the mix, hardening times and reactions that occur between the water, aggregates (crayfish shells) and the Japanese knotweed binder. With the appearance of raw concrete, marble or natural stone, the duo's hand-shaped bio-concrete tiles come in a range of shades from white to wine-red, with or without inclusions of knotweed root fragments.

"For the moment the material is purely decorative as it cannot integrate structural architectural elements but is suited to store interiors, window displays or even in caps and ornamental pieces for packaging."

Read more:
https://www.formesdeluxe.com/article/japanese-knotweed-what-material-solutions.64278

#SolarPunkSunday #Cosmetics #SustainableFurniture #Bioconcrete #NaturalDyes #Paper #Fiber #BambooSubstitute #Cellulose #FallopiaJaponica

Senior Science Project: Convenient, Eco-friendly Chemical Treatments For #FallopiaJaponica (#JapaneseKnotweed)

"Problem: Japanese Knotweed is a highly invasive species, which threatens to out compete many native plant species in the eco-systems of North America. Invasive infestations such as that of Japanese Knotweed are extremely disruptive to the natural rhythms of both flora and fauna of a given habitat. This is why controlling Japanese Knotweed has been made a priority by most conservation efforts in areas where it is present.

Thus far herbicides have proven to be the only effective treatment for killing this plant and ensuring that it does not come back to re-inhabit the same given location. Due to the extensive root system, which if left even partly intact will cause the plant to re-sprout with greater vigor. Cutting, burning, and even manual extraction of each individual plant often prove to be ineffective. The herbicides used in treating Knotweed are not unlike household weed killers such as #Roundup®. These herbicides are designed to have minimal environmental impact but still are discouraged by environmentalists due to potential for soil and water table contamination. The goal of this experiment is to find a cheap, accessible, and environmentally friendly alternative to the herbicides on the market.

Control Treatments:

- Water
- Roundup

Experimental Treatments:

- Isopropyl (rubbing) Alcohol

Known to kill foliage by dehydration. This puts stress on the plant as a whole.

- Glucose syrup

Glucose is the product of photosynthesis and a plants primary source of life energy. In animals the introduction of unnatural levels of many hormones and chemicals (including sugars) can disrupt the organisms ability to produce these crucial chemicals naturally. The introduction of high levels of foreign glucose may disrupt the plants ability to produce glucose naturally.

- Brewed Coffee

Coffee contains a multitude of stimulants and other chemicals. One of these compounds is dimethyl-xanthine, which has been shown to inhibit the production of cytokinin, which is crucial to root growth and cell development. This chemical may attack the roots as well as the foliage.

- Magnesium Sulfate (Epsom salts) dissolved in water

This salt very hydrophilic and likely to absorb water from foliage and stem. May hinder transferal of water from roots to foliage.

- Phytophthora Cinnamomi

This is a common fungus also known as “root rot”. It decays roots that are in wet or saturated soil causing plants roots o rot thus killing the entire plant. This fungus is aggressive and seen as a worldwide threat to plant life. If injected into knotweed stems this fungus may selectively kill the target plant with out threatening neighboring plants.

- Vinegar

Vinegar is acidic and will kill foliage and stalks. Apart from stressing the plant above ground the low ph may also kill roots if absorbed from soil.

Conclusion: "The commercial treatment for Japanese Knotweed (Roundup) did not kill its host plant. Vinegar and coffee proved to be far more effective then the herbicide option in killing this weed. The vinegar’s acidity appeared to overwhelm the plant so quickly that the roots system may also have been stressed. It appears likely that the coffee did what was predicted. It attacked the root system causing the entire plant to die.

It was surprising to find the specimen treated with Roundup to still be alive after nine days. Its growth was clearly inhibited and its foliage did show signs of stress. This plant may be hearty enough to resist the herbicide. The abrasive properties of the alcohol likely caused the damage to the foliage thus stressing the plant enough to prevent further growth."

https://howtokilljapaneseknotweed.blogspot.com/2011/05/senior-science-project-convenient-eco.html

#SolarPunkSunday #JapaneseKnotweed #Bamboo #NaturalWeedkillers #CitizenScience #ScienceProject