Here's the poem, courtesy of the Poetry Archives. And all the other book anthologies I have offer the same print. I have always seen "Gather ye rose-buds while ye may," but notice that Herrick uses both forms, ye and you, in the final stanza.
TO THE VIRGINS, TO MAKE MUCH OF TIME
by Robert Herrick (1591-1674)
Gather ye rose-buds while ye may:
Old Time is still a-flying;
And this same flower that smiles to-day,
To-morrow will be dying.
The glorious lamp of heaven, the Sun,
The higher he's a-getting,
The sooner will his race be run,
And nearer he's to setting.
That age is best, which is the first,
When youth and blood are warmer;
But being spent, the worse, and worst
Times, still succeed the former.
--Then be not coy, but use your time,
And while ye may, go marry;
For having lost but once your prime,
You may for ever tarry.
AN EPITAPH UPON A VIRGIN
Here a solemn fast we keep,
While all beauty lies asleep;
Hush'd be all things, no noise here
But the toning of a tear;
Or a sigh of such as bring
Cowslips for her covering.
Robert Herrick