Certified Organic farm near Edmonton, Alberta, Canada producing Golden Flax, Buckwheat, Wheat, Barley, Oats, Peas, Rye and heritage varieties of grains. We are a small family farm supplying wholesome local food to our friends and neighbours.
Hi Auntie, Here is the link for the farm by Edmonton for you, as you can see they have a good supply of different things including the Barley you were looking for as well as the soft white flour, they say they sell in Stony Plain and at http://www.spruceparkranch.ca/ just outside of Spruce Grove.
Had a boo in my books on the acid level for rubarb, and at its highest it appears to be about 3.5 percent and that’s if you are using the old fashion green or even better the medical rubarb, the big strawberry Red Rubarb is got a even lower rating, where as the lemon Juice is 5% and Vinagers range between 5 to 7 pecent, that is a big difference, I would think if you wanted to use Rubarb Juice, you would need to make homemade vinager first with it before using it for the best results.
Its for the local diet for my relatives in the Edmonton Area..
Just another Day on the Farm 
Thanks ! The Ranch is just down the road from where I get my eggs! I love your site, it’s fabulous! Tried making the goat cheese with lemon juice — it’s a real winner. Thanks a bunch!