When they die down in autumn, the leaves should be placed loosely over the crowns, with their stems on top to prevent them being blown away by the wind."
Most die down to ground level in the autumn, some go back to a woody rootstock.
The stems and foliage die down in winter leaving a stout taproot.
They'll die down there in the grass, said the third lawyer, whose name I forget.
After ripening of the seed, the leafless flowering culms always die down.
