30 When they sprout leaves, you can see for yourselves and know that summer is near.

Read Luke 21:30 Using Other Translations

When they now shoot forth, ye see and know of your own selves that summer is now nigh at hand.
As soon as they come out in leaf, you see for yourselves and know that the summer is already near.
When the leaves come out, you know without being told that summer is near.