I can think of a thousand things :) Do you want accents or low front stuff?

I'd say anything from lilies, larkspur, and poppies(though they need a lot of sun) to sedum, phlox, and wild lupine.

-Marie

Maybe because it is in bloom, but I like Astilbe.
But maybe lean towards a different shade of green. Do you want to stick to white flowers? is it fairly shaded?

Holly

With those nice shrubs, consider texture and contrast.

A sun trio in order of height: Artemesia lactiflora 'Ghizo', Hosta 'Sun Power' and Ajuga 'Chocolate Chip'. If you want more flower power, drop the Hosta and add a variegated Phlox.

A sun duo: Lysmachia 'Alexander' (or 'Golden Alexander') and Filipendula vulgaris. Even when done blooming the F. vulgaris has great ferny foliage. If room, maybe a little Blue Fescue in front?

Another sun trio: Calamagrostis 'Karl Foerster', Stachys macrantha and Petrorhagia saxifraga.

A shady side with only morning sun?: Hosta 'Great Expectations' (or any look-a-like) and Polemoniums.

Tuck in Geranium 'Jolly Bee' anywhere in the middle and let it poke up bright blue flowers everywhere from its trailing, non-rooting stems.

Another tucker? Gypsophilia 'Vliet's Dwarf' (??SP) is about 18" and long blooming. Would look good filling in around and through the shrubs. If a shady spot...substitute Galium 'Victor Hugo', about 30" tall with white Baby Breath-like dainty flowers.

Shady nooks? Pulmonaria, any with spotted/silver foliage. Hakonechola macra aureola or the all golden variety. Japanese Ferns. Small vigorous Hosta with a good amount of white in its leaves like 'Pilgrim'.

I think I better quit. I have your bed jammed full!
Jan

Ooops! I assume you understand/know I wasn't suggesting putting all those contrasts and textures into one bed! Wouldn't that be eye boggling? Using a few plants for contrast and texture midst the shrubs was the idea I was trying to convey.

Just thought of another one! LOL. Coreopsis verticillata, either 'Moonbeam' or 'Zagreb' would be a nice textural contrast to the shrub foliage.
Jan

okay, first OOPS! I mrant to say SE side of house. Gets very little sun, a bit in the early AM is all.

That said, I will be doing a search on several of the suggested shade-loving plants. Not particular about flower color, just want to fill out the area nicely.
Thanks, keep em coming!

Linda

Do you have any other viburnums near by? My understanding is that is will produce more berries with another variety near by. Maybe you don't care about berries but thought I'd mention.

Jan - thanks for all the suggestions! There were several you mentioned that I'm not familiar with. Have you had any luck with Hakonechola macra aureola? I thought it was zone 5 or higher. Anyone else?

You might want to consider coral bells (Heuchera) or Heucherella (coral bells - foam flower cross). The foliage is worth the price of admission and they come in a range of foliage colors from emerald green, to frosted blue-green, to slivery, to purple-ish, to brownish, to yellow-orange-mango. The flowers attract butterflies. They do not need full sun. Here is a link to Terra Nova, one of the premier hybrdizers.

Here is a link that might be useful: Heuchera at Terra Nova

Hakonechola macra aureola is hardy in Zone 3. Zone 2 gardeners grow it successfully!
I don't think there are any ornamental grasses rated for zone 2 & 3. Doesn't mean that that some are not hardy in the colder zones....just means they have never been 'officially' tested any farther north than zone 5.
Jan

Manyhosta, I have some heuchera that is possibly Palace Purple in the bed on the other side, maybe I will move them here. Good idea, thanks!
Linda

Green spice is another good coral bell to consider. Would mix in nicely with your palace purple, too.

Here is a link that might be useful: 'Green spice' pic

Lysmachia 'Alexander' does all right in part shade too. I strongly second the Pulmonaria.

For spring bloom, Forget-Me-Nots, white bleeding hearts, Phlox divaricata (wild blue phlox), pasque flowers, bergenia, Brunnera 'Hadspen Cream' or 'Variegata', and Anemone sylvestris would all work well.