Rhubarb, a vegetable known for its colorful stalks, signals the beginning of spring for many. Rhubarb typically begins to appear in late April and early May. Rhubarb is easy to grow and will stand considerable neglect and still be there the following spring. The leaves are not edible raw or cooked. Poisoning has been reported from eating the leaf blades of this plant. Rhubarb sometimes will pro...