Oh, you said you had green growth at the base of a dead-looking cane, so I misunderstood. I guess you should wait and see what happens with the ones that show the opposite. If it's purple in the middle and green on top, the cane probably isn't really dead at the base, although it's also possible that the "death" is traveling upward and hasn't reached the top yet. Just leave it alone and see what happens.
