its never to late to plant rhubarb all you have to do is find someone who has some ie local allotments and under ground is a solid lump og roots that all you have to do is hack a lump offmake sure you have a growing point with it and as for the soil dig a hole loosen the soil at the bottom and keep watering for at least a month two gallons per plant to get it growing and as for mine i grow them inside two tyres/ tubes and each year in winter i just fill it up with horse muck or compost. good luck marcus
Heather I don't think you need protect it from frost in winter, rhubarb is tough as old boots. In fact when they want to force really early rhubarb using warmth they dig up the roots and expose them to the frost before planting them inside. People put buckets over rhubarb to bring it on slightly earlier and to draw out long slender and delicate shoots.