perennials w/ long bloom season

This is my first year gardening at my new house. In other houses, I just added on and moved around plants that the original homeowner's had. This is my first total design and planting landscaping.

I put in a lot of greenscape - holly, rhodo, boxwood, ornamental grasses. I planted lilies, coreopsis, jasmine vine for color, supplementing with annuals. To get nice splashes of color that last, I am buying lots of annuals. I'd like to spare myself that expense every year. I bought some reblooming lily bulbs, and they have leaves but havent bloomed yet. What other perennials will give me steady blooms for most of the summer?
(The coreopsis is Snowberry, it started blooming 2 weeks ago, and hopefully will go till frost, with some cutting back)

garden phlox planted in both sun and shade will have an extended season. Those in shade bloom later than those in sun. Also, inexpensive seeds like poppies and calendulas, annual dahlias, and larkspur planted in consecutive plantings will give you color - some times when you least expect it. Late summer native plants like turtleheads (Chelone glabra), vervain (Verbena hastata) and great lobelia (Lobelia syphilictica) will begin when some of the others have begun to wane. Rudbeckias have a long bloom time later in the season as do hollyhocks. Planting perennials like autumn asters and hardy chrysanthemums (not the ones they sell at the box stores) will take you into early fall. And little things like violas and the hardier pansies will bloom year around if given enough moisture and protection from full summer heat.

I have listed a number of perennials that offer a prolonged bloom period. Some bloom early spring to early summer others summer into fall. I have gotten the biggest bang for my buck by starting off with bulb plants. Tulips that are perennial (Emperor or Fosteriana, Triumphs, Darwin Hybrids and Greigii. Also Narcissis and many of the smaller bulbs that also come back every year. A good catalog with good pictures is John Sheepers also on line @ www.johnsheepers.com By picking and choosing your varieties you can get almost 2 months of bloom which will bring you to the start of the perennials listed below. Again there are no perennial plants I am aware of that bloom from early spring to frost. You will have to do your homework and choose those that work for you.

Coreopsis Moonbeam
Early Sunrise
rosea Nana

Leucanthemum (Shasta Daisy) Snow Lady
Becky
Silver Princess

Agastache

Nepeta Walkers Low
Blue Moon

Perovskia (Russian Sage)

Daylily Look for re-bloomers

Gailardia
Delosperma
Platycodon
Heuchera
Echinacea
Lavender

There are also perennials and grasses that create interest by means of their foliage and growth habit so don't rule them out.
My suggestion is to take your time and make a plan. You don't want to create something you become a slave to. Been there, done that.

My favorite flowers in my gardens are the coneflowers. They start blooming in late May or early June and they bloom until frost. Very easy to grow and they come in a number of colors and sizes.

Also try the cranesbill geranium Johnson blue -- I believe that's the full name. These are great for cascading over a patio or deck railing. Check the tags, though, as some cranesbill bloom for just a month, while others go for the full season.

Another good one, which is an annual in my Zone 5 but probably perennial in your zone is gaura-- comes in pink or white. Very whispy flowers on long flowing stems.