Cook
Thanks Iron Chief

Before any changes I'm a garlic or spice. My first is altered and I'm a hand-warming device. My second is changed and I'm trees in full bloom. The next letter change makes a deathly old tomb. Change the fourth to make a fruit of the vine. Change the last for a chart plotted with lines. Questions : What was I? What did I become? What did I turn out to be? Answer : clove glove grove grave grape graph