Pagans don't proselytize. We don't need to.
They come to us.
Why? Because, unlike other religions, “pagan” isn't something that you convert to.
Pagan is what you already are.
Paganism is inherent in human experience. Everyone is born pagan.
Anything else, you have to be made into.
“Becoming” pagan, then, is a process of recovering what's already yours, yours by right.
How do we “grow” paganism?
We “grow” paganism by being the very best pagans that we can be: by living a paganism so true, so beautiful, so desirable, that others look at us and say: What they have is the real thing; I want it too.
No, pagans don't proselytize; in fact, we look down on those that do.
We don't need to.
Above: Bialowieza Forest (Poland)
One of Europe's last remaining Old-Growth ("virgin") forests