James Wong's - Homegrown Revolution

NEW ZEALAND YAM HARVEST

Posted on: January 30th, 2013 by James Wong 5 Comments

Tired of watching your spuds getting clobbered by blight? Well fear not. Introducing New Zealand Yams, the delicious & super easy-to-grow spud substitutes that come complete with an iron-clad blight resistance. Hooray!

WHAT ARE NEW ZEALAND YAMS? Oxalis tuberosum

Despite their (rather confusing) common name, New Zealand yams actually hail from the highlands of South America where they have been cultivated since Incan times & held in roughly equal esteem to the common spud.

In fact it’s really only historical fluke that has seen potatoes (also originally domesticated by the Inca) become a global staple, while these delicious little yams remain a well kept foodie secret. If the right conquistador had picked these guys up, fish & chips could look very different indeed. :)

NEW ZEALAND YAMS IN A WELLINGTON SUPERMARKET 

(Click the pic to check out the link.)

As far back as the Irish potato famine these tasty, multicoloured tubers were tested out as a disease resistant alternative to spuds in an age when it seemed that the potato’s ridiculous susceptibility to blight in our mild, soggy climate would soon make it commercially extinct. Tried growing spuds over the last 2 summers? Sound familiar?

So, why the name New Zealand yams? Well those kiwis are known for being far more excited and adventurous about alternative crops than us Brits and in the last 30 years they have risen quickly to become a standard supermarket vegetable Down Under – as the picture  above proves (Check out the sprouts in the top left corner).

Click the pic to find out more info from the great ‘Grab Your Fork’ blog.

HOW TO GROW NEW ZEALAND YAMS

Extremely closely related to wood sorrel (a common UK garden weed) New Zealand yams are a cinch to grow even in our less than idyllic climate. You see the Inca were rather genius agriculturalists, with many of their prized crops domesticated from pernicious weed species – thereby creating super-vigorous, low-maintanence veg that would thrive through pretty much anything that is thrown at them.

In fact, they are already being cultivated on a commercial scale in Norfolk by my twitter buddy Jonathan Pearson @Freshfromthefen. The only thing they they really dislike is excessive and prolonged hot weather. Not sure that is going to be a problem any time soon…..

Unlike spuds, there is no need for dodgy chemical spraying or laborious earthing up & they even have tasty Bramely-flavoured, shamrock-shaped leaves – meaning two harvests from the same plant. Neat huh?

PLANT NEW ZEALAND YAMS UNDER TALLER STUFF LIKE TOMATOES OR SWEETCORN TO GIVE YOU 2 CROPS FROM THE SAME TINY PLOT.

(Click the pic to find out more)

There are only two golden rules to bear in mind. Firstly much like regular potatoes, New Zealand yams benefit from being tricked into growth early indoors (i.e. what plant geeks call ‘chitting’). I like to do this buy potting them up in a seed compost on a sunny windowsill in late March or early April, then planting established plants out after all risk of frost has past in May.

Secondly, it is important to leave these little guys in the ground for as long as possible – until a good 2 weeks after the first hard frosts cuts down their foliage. This is because the plants only begin to kick out tubers rather late in the year, so the longer you leave them the better your yields will be. If you are keen on growing these in the far North or a freakishly early frost is forecast a simple tip to up your yields is to pop a couple of cloches over your plants as the nights begin to draw in in Autumn.

Want more tips on growing New Zealand Yams? Check out page 151-153 of my book ‘Homegrown Revolution’ & this fantastic blog http://oca-testbed.blogspot.co.uk

WHERE CAN I BUY NEW ZEALAND YAMS?

Slowly but surely New Zealand Yams are becoming available through a range of suppliers, who normally sell them under their indigenous Peruvian name ‘oca’.

By far the best selection (and quality) for me has been the company Real Seeds, who I buy mine from through their mail order website. www.realseeds.co.uk

HOW TO COOK NEW ZEALAND YAMS

Way more versatile than the humble spud, New Zealand yams are delicious both raw and cooked – roasted, chipped, mashed, boiled & baked in all the same ways as a really good new potato. Raw they have a crisp apple-like texture and tart Bramley flavour which makes them used much like a fruit in salads & coleslaws.

Once cooked however, their sharpness transforms into a mild tanginess that is off set by a rich, waxy classic Jersey Royal flavour & texture. Being such a unique ingredients, I don’t like to mess around with them too much, serving them in super simple, fuss-free dishes like these paprika & mint wedges. Yum!

NEW ZEALAND YAM WEDGES WITH PAPRIKA & MINT

The ultimate comfort food in the dark days of winter, these surprisingly healthy wedges as as delicious as they are easy-to-make.

STEP 1. Kick off the proceedings by preheating your oven to 200C. Then give 1kg of yams (about 1-2 plants worth) a really good scrub & slice them in half.

 STEP 2. Scatter the sliced yams into a roasting dish, cut sides facing up. Then sprinkle over some really good quality smoked paprika, drizzle over a little over oil and season well with salt & pepper. Pop in then oven for 20-30 minutes or so until the yams are golden and cooked right the way through.

 STEP 3. Scatter over a few torn mint leaves & tuck in! Lovely as a substitute for spuds with a Sunday roast or just as they are, dunked in a herby sour cream dip. God bless carbs!

 

For full instructions on how to grow, cook and eat New Zealand Yams check out pg 151-153 of my new book Homegrown Revolution!

 

5 Responses

  1. I hadn’t heard about these before your talk today at Seedy Sunday in Brighton, but they look good – might give growing them a go!

  2. Stuart Hyne says:

    Planted some in 2012 but never saw them again. My potato harvest was miserable too so I’ll blame the weather and give it another try this year.

  3. Nan Ottrey says:

    I’m from NZ and we love these little beauties. They are so useful, the large for roasting, and the smaller ones to pop into vege soup. They are delicious as a separate dish roasted with garlic, ginger, soy and brown sugar!
    As they grow each year in the same ground only good manuring is needed.

  4. water says:

    Just recently had i learned that the potato that we know of in the average grocery store was altered from it’s bumpy and uneven shape, to accommodate the America french fry and now an epidemic . More fries can be cut from a potato that has smoother sides and larger. Wonder if McDonald’s had anything thing to do with that.

  5. Darcia says:

    Hi there- I’ve seen these in the supermarket but have never tried them (shocking for a full time kiwi!). After reading your blog I’m going to give them a go!

Leave a Reply