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The hardest plant to grow is...

21 September 2014 15:46
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The hardest plant to grow is...

NEW YORK. KAZINFORM - For nearly 30 years, Brian Oates has, in his words, "pig-headedly" devoted himself to a single pursuit: setting up the first commercial wasabi farm in North America.

Dozens of others in the US and Canada have tried to grow the plant - a type of horseradish that originates in Japan, where it is found growing naturally in rocky river beds - but almost all have failed. The reason is simple: wasabi is deemed by most experts to be the most difficult plant in the world to grow commercially. So what drives Mr Oates, and his business Pacific Coast Wasabi (PCW), other than his stated stubbornness? Fetching nearly $160 (£98) per kilogram at wholesale, in addition to being hard to nurture, wasabi is also one of the most lucrative plants on the planet.

"It is much like gold - we expect to pay a lot for gold. Well, we expect to pay a lot for wasabi," says Mr Oates.

The real thing
The first thing to know about wasabi - or Wasabia japonica, as it's officially known - is that you have probably never tried the real thing. That light green paste nestled next to the pink ginger in your box of sushi? It is most likely a mix of mustard, European horseradish, and food colouring. In fact, by some estimates, only 5% of the wasabi served in Japanese restaurants around the world comes from the rhizome, or root, of a wasabi plant. The methods for eating real wasabi differ significantly from those of the powdered kind, particularly if the plant is fresh. In its most traditional preparation, the root is stood on a grater made of a piece of sharkskin stapled to a wooden paddle. Using a circular, clockwise motion, one presses the rhizome down and a paste is formed. The heat and flavour - significantly less bracing than imitation wasabi, but similarly sharp - last only for 10 to 15 minutes, so wasabi is grated as needed. Nobu Ochi has been buying the wasabi Mr Oates produces from the beginning, and selling it to customers at his Zen Japanese restaurant in downtown Vancouver.

"We send the grater out with the wasabi in it, and let them have the experience of grating fresh wasabi," says Mr Oichi.
"Once they taste it, like anything else that's good, you don't want to go back to the other stuff."

Wasabi was initially used by the Japanese many centuries ago as a way of preventing illness: the story goes that it was used on raw fish to prevent food poisoning, not because of its spicy taste. But because wasabi is grown in a manner unlike most other crops, it has long been mostly cultivated by the Japanese for the Japanese market.
"It's a water loving plant, but it does not grow completely submerged in water like a water lily or something," explains Prof Carol Miles, from the Department of Horticulture at Washington State University .

"In general, water flows over the crop, so it's grown in water beds and that's not something we commonly do in North America."

Hatching a seed
In addition to wasabi's unique cultivation, the problem for the would-be North American wasabi farmer has also been access - getting their hands on seeds or cuttings from which they can try to grow the plant.
"Access to the plant material has really been the bottleneck," says Prof Miles.
Mr Oates says he first became interested in farming wasabi in 1987, but it took him six years simply to get access to viable seeds from which he could grow the plant. For years, he grew the crop in greenhouses on the University of British Columbia's (UBC's) campus in Vancouver, where he worked at the time, but kept running into problems. Finicky wasabi, if exposed to too much humidity, would die; the wrong nutrient composition could lead to a similar fate. And then, there was the problem of scale.

"There seems to be an understanding in agriculture that when you keep your crop small it's fine, but then when it gets big all of these issues you didn't have before rear their ugly faces," says Mr Oates.
He notes in particular that wasabi is especially prone to disease when planted on a large scale. But finally, after working with graduate students at UBC, he developed a method - which is now a trade secret - that allows wasabi to be cultivated on an industrial scale without succumbing to disease.

Potential health benefits
Now that the culinary side of the business has legs, Mr Oates and his colleague, Albert Agro, have hopes of expanding into pharmaceutical products. Mr Agro, who is chief executive and president of Wasabia, the medical side of the business, says studies have shown that extracts of wasabi can have health benefits, such as anti-bacterial and stomach-calming properties, and the ability to help reduce wrinkles. The difficulty, as with most plant-based medicines, is to produce enough wasabi consistently to be able to generate a product. There are efforts under way in New Zealand and China, and there are already some wasabi supplements available on the web. Wasabia has plans to begin medical trials later this year in Malaysia, but Mr Agro says that the company is focused on the longer term, content to wait until there is enough data to back up a pharmaceutical product, BBC reported.


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