Brooklyn1 writes:

On Mon, 15 Apr 2013 07:55:45 -0700 (PDT), mkr5000
wrote:

I have an area that I want Lily of the valley to run rampant, would also like a possible companion plant?

Lily of the valley are invasive and exclusionary... most similar size
plants will likely be crowded out... plant shrubs/trees.

Our lily of the valley don't seem to grow thick enough to crowd anything
out. But they don't stay in place either. We have some coming up
through Vinca. I don't think I'd plant them that way on purpose though.


--
Dan Espen