For similar flowers that do well in shade, you'll need to look to perennials. Japanese anemones will do the job in late summer to autumn. http://canadiangardening.com/plants/turning_japanese.shtml Cosmos WILL give you some flowers in shade, just not nearly as many as they would do in sun.

If you like hedges, these roses, shaped, could make partially leftover ivy look soft and 'trailing' in contrast.... Sunny Knock Out Rose Zones: 5 to 10 Mature Size: 3 to 4 feet tall and 4 to 5 feet wide Sunlight: Full sun to part sun Drought Tolerance: Good You really can’t go wrong with the immensely popular Sunny Knockout® Rose. Your neighbors will covet your beautiful roses that flower almost nonstop for 3 seasons! Because they are disease and pests resistant and don’t even require deadheading, Knockout Roses are much easier to care for than standard roses. These roses are absolutely stunning in a mixed bed or border. Try a mass planting or a hedge for huge impact. Sunny Knockout roses have single yellow blooms that are sweetly fragrant.

A few very hardy evergreen shrubs I currently grow in z8 Texas, alkaline soil, some caliche: Dwarf yaupon holly Golden Euonymus ’Sunshine’ ligustrum Abelia — ‘Kaleidoscope’, ‘Edward Goucher’, ‘Twist of Lime”. Lots of great drought-tolerant perennial choices ... you can’t go wrong with Salvia greggiis or other salvias/sages. Rosemary would do well, too, as a shrub. Other tough ones: Gauras, catmint, Oenothera ‘Lemon Drop’ (mine below in hell strip), Drift rose (also below), Mexican Heather, dwarf Nandina ‘Firepower’, feather grasses (make sure they aren’t invasive in your area), and the toughest of all — lantana. Mealy sage with a ‘Texas Pink’ phlox (will bloom in a couple more weeks) and a mid-size crape myrtle that I limb up:

I have no favorites since I literally began my rose garden four days ago, and as of now not a single rose has been planted. I did buy three pots of pale pink dianthus to plant in front of the roses when they arrive here on 10/30, and later, if all goes well and my plants don't get eaten by the ground squirrels, I plant to intersperse the roses with some blue and purple companion plants, the type not yet determined, although everything I see on this post looks gorgeous. I'd also like to have reblooming irises as I did in my previous rose garden. Limonium perezii (sea lavender) was also a favorite near the roses.