Definition of "aftergrass"

For the ordinarie times of foddring your fat cattell […] if they féede abroad, and take the benefit of Foggs and after-grasse, then to fodder them Morning, Euening, and high-noone is fully sufficient.

1614, Gervase Markham, chapter 7, in The Second Booke of the English Husbandman‎, London: John Browne, page 99

This recess, towards the close of September, when the after-grass of the meadows is still a fresh green, with the leaves of many of the trees faded, but perhaps none fallen, is truly enchanting.

1820, William Wordsworth, The River Duddon‎, London: Longman, Hurst, Rees, Orme, and Brown, pages 44–45

The cool silk of aftergrass under her bare feet

1974, John McGahern, The Leavetaking‎, Boston: Little, Brown, Part 1, p. 68