More about Rhubarb: Rhubarb comes in both red and green varieties. Both varieties work equally well for cooking, canning and making pie. Rhubarb is often sold by the “bunch” which is usually 2 to 2 1/2 pounds. When you buy rhubarb, choose fresh crisp stalks. Always peel off any stringy covering before use, and then stand the stalks in cold water for about an hour to refresh them before cooking (skip this step if you grow your own!). It’s important to note that you should never eat the leaves of a rhubarb plant – they’re toxic.