Vinlander what height and spacing did you use...wondering about pots or in wee raised bed I have. I also have two space 30 litre pots.
Ah... there's the rub. I love 'em, and want to grow them but there are many hurdles before you get a crop, and I'm not sure they will ever make anyone chufa-self-sufficient planted outside in the UK (I can't really afford the space in my polytunnel).
That's why I'm looking forwards to finding out how the Dobies plants do... Maybe their first year in a polytunnel would tip the balance enough for cropping in open ground.
I've had very little success getting the tubers to sprout in spring - and when I got a few sprouts into a big pot they didn't produce much more leaf than a grass seed would have in its first year - no surprise that there were no tubers produced.
So I still don't know if they taste better fresh.
It became even more frustrating when they started disappearing from shops about 8 or 10? years ago - when you could buy tigernuts in health food shops for about the same price as sunflower seeds. Originally they were a weed in the Valencia rice fields - that's what's so nice about the whole story - the Valencians went one better than turning lemons into lemonade.
It's nice that they are having a renaissance - but if they take off as a superfood I'm sure the shop price will magically change to something like pine nuts. Then it would be cheaper to fly to Valencia and bring back 5 kilos, never mind 22.
Here is a link that hints at the requirements http://en.chufadevalencia.org/ver/14/Tigernut-cultivation.html
There is also a map in a study link showing main production in Spain and Africa. Also some local production in places colder than the UK - but nothing about how they do it.