when they now shoot forth, ye see it and know of your own selves that the summer is now nigh.

When they put out their young leaves, you take note of it, and it is clear to you that summer is coming.

Οταν ηδη ανοιξωσι, βλεποντες γνωριζετε αφ' εαυτων οτι ηδη το θερος ειναι πλησιον.

When they now shoot forth, ye see and know of your own selves that summer is now nigh at hand.