This is undoubtedly how this species spread naturally as an escape from gardens.

It's possible for plum pox to spread naturally.

To me, it doesn't sound as if the disease is spreading naturally.

When the type is printed, ink naturally spreads into the removed area.

The cultivation of cassava did not spread naturally.

Word of new talent naturally spreads more quickly in a smaller country.

Early hopes that it would spread naturally, eliminating the fatal form of the disease, have not materialized.

Species that successfully adapted to one location, he thought, would spread naturally to others.

Just make sure you follow your normal patterns of interaction with diggers and angels, and the disease will spread naturally.

It spread naturally to Southeast Asia, at ports on trading routes.