I have lychnis viscaria (http://davesgarden.com/pf/showimage/1030/)and love it. It looks a bit like silene but isn't.

My lychnis viscaria plants were here when I moved here and I had no idea what they were. I actually "met" Gardenweb when I posted a "What Is This Plant?" here about them and got a really fast answer. (http://forums.gardenweb.com/forums/load/carolgard/msg041636387762.html)That was last spring.

In the meantime I have saved seeds from my "German Catchfly" and wintersowed it so I'll be able to spread it out in another of my flowerbeds. YAY!!

It appears that the Silene and the Lynchnis are of the same family, although the Silene is an annual.

I also have Lynchnis Viscaria Splendens Fever (German Catchfly). Winter sown two years ago, it has done so well in the gardens I've used it as a border in one area, and this year have to divide the footings. It is also a great early food scource for Monarchs.

The Sphinx Moths (hummingbird Moths) also go nuts on it!

{{gwi:267935}}

Do you guys have it in full sun, or partial shade?
Thanks
Maggie

Rose of Heaven is Silene coeli-rosa (a.k.a. Lychnis coeli-rosa, Viscaria elegans and Viscaria oculata) is an annual, and it should do well in full sun. Keep in mind that it gets a bit ratty in late summer, so you might want to place something in front of it.

Tiffy - Nice picture! Milo, what about part sun??? Thats mostly what I have. Thanks for the info.
Maggie