Liatris spicata ‘Alba’

I grew these this year. Low growing, good for front of borders. Leucanthemum 'Aglaia' Shasta Daisy: Full Sun, perennial, blooms all summer if deadheaded, divide every 2-3 years. So fluffy & pretty!

Liatris "Blazing Star" white. Pin: "Looks great in a "moon garden" as it seems to glow at night."

Liatris spicata

Moss Phlox (Phlox subulata) is a richly flowering, clump-forming phlox that stays green in both summer and winter. In spring these plants produce innumerable crimson and white flowers that attract butterflies. These Phlox like to be planted in full sunshine.

Lupins - Gallery White

Blue Queen Salvia...I love love the color and it's heat and drought resistant.

Pink Spike Bugbane (Cimicifuga). These plants have the most intoxicating fragrance. Will grow in full or part sun or shade. The key is that the soil must be moist.

Muscari in White

~Endless Summer Blushing Bride' Hydrangea Blooms All Summer Like the original 'Endless Summer' hydrangea, 'Blushing Bride' produces blooms throughout the season on both new and old stems. The pure white flowers measure up to 8" across and blush pink or deep blue as they mature, depending on your soil pH. Unlike most other hydrangeas, 'Blushing Bride' will bloom even if its buds have been damaged by cold the previous winter. Blooms from June to first frost Flower clusters are 4-8" across

Sorbaria, Sem | Perennial. This small shrub delivers a fabulous show in spring. Fern-like leaves are beautifully tinged yellow to pinkish red when young. Deeper pink stems are great backdrops. Durable and cold-hardy, plants carry on, with large sprays of creamy white flowers in mid summer. Easy to grow in well-drained soil, in full sun to part shade.

Clematis Vienetta

~ "White Feathers" Hosta ~ Comes up white in the spring and turns a super pale green in the summer. ~ Gorgeous. ~

Cimicifuga simplex Hillside Black Beauty aka Autumn Snakeroot (zones 4-9) elegantly cut foliage and 5ft tall, fragrant white flower spikes in late summer. But it has foliage that is the darkest available, an almost black purple, that, unlike others, doesn't fade as the season progresses. A statuesque plant with best leaf color in light shade. Try it with Hostas and Hackonechloa.

Originally found growing wild in the American prairie, Liatris, or blazing star, is now a top pick for hot, sunny gardens:

Longfield Gardens-Liatris Blazing Star/ATTRACTS: Monarch Butterflies.

Candytuft: an evergreen perennial - growth habits are on this post. This is an easy plant to divide.

Sensational Speedwell An unsung hero of the perennial garden, speedwell comes in a variety of shades of blue, pink, or white. All produce upright flower spikes on mounded plants. After the first set of blooms begins to fade, shear the plant to encourage branching and rebloom. This combination of spike speedwell, Knock Out rose, and Six Hills Giant catmint creates a spectacular season-long show.

Angel white lilacs

Speedwell...grows very well in south facing beds (I haven't killed mine yet)

Giant Milk Thistle. Love these! Full sun! Perennial, bloom mid-Spring.