Spinach is a must-eat superfood and not too hard to grow. It's one of the superfoods available in Canada along with berries and tomatoes. Spinach is one of those foods that you should eat organic (or at least spray-free) even if you don't believe in organic. But 200% organic (just soil and shit ) like @Drutter grows or that you often find at the Farmer's Market is best. I love those Farmers that don't waste money on certified organic, they're often less natural than other farmers that don't bother to get certified.