The cortical tissues gradually shrink and dry up, turning brown and black in patches or all over, and when at length the cambium and medullary ray tissues dry up the whole twig dies off.
The fruit is at first coral-red, afterwards dark purple or almost black, and the foliage dies off a rich claret.
Being slow to spread and difficult of increase, it should be left for several years undisturbed, and while of strong growth, it sometimes dies off suddenly.
This way you are able to harvest your crop before the plant dies off.
