61 However, before the season comes, those things also are not believed, for every season is not suited for the raising of seeds. Wheat is sown at one time, and comes up at another; at one time the vine is planted, at another the budding twigs begin to shoot, the foliage grows luxuriant, and the grape is formed; at one time the olive is planted, at another time, as though pregnant and loaded with its offspring of berries, it is bent down by the abundance of its fruit. But before its own period arrives for each, the produce is restricted, and that which bears has not the age of bearing in its own power. One may see the mother of all at one time disfigured with mould, at another bare of produce, at another green and full of flowers, at another dried up. Any spot which might wish to be always clothed and never to lay aside the golden dress of its seeds, or the green dress of the meadows, would be barren in itself and unendowed with the gain of its own produce which it would have transferred to others.
Source: On the Death of Satyrus (New Advent)