Whilst it is yet in his greenness, and not cut down, it withereth before any other herb. Whilst it is yet in his greenness - We do not know enough of the natural history of this plant to be able to discern the strength of this allusion; but we learn from it that, although this plant be very succulent, and grow to a great size, yet it is short-lived, and speedily withers; and this we may suppose to be in the dry season, or on the retreat of the waters of the Nile. However, Soon Ripe, soon Rotten, is a maxim in horticulture.
Related Commentaries of Job 8:12
Job 8:12
12 Whilst it is yet in his greenness, and not cut down, it withereth before any other herb.