Veronica is easy-to-grow and may be the longest-blooming perennials in your garden! Check out more perennials @ http://www.bhg.com/gardening/flowers/perennials/the-best-perennials-for-cutting/?socsrc=bhgpin091913veronica#page=20
Aubrieta - low, spreading plant, hardy, evergreen and perennial, with small violet, pink or white flowers, and inhabits rocks and banks. It prefers light, well-drained soil, is tolerant of a wide pH range, and can grow in partial shade or full sun.
Power Perennials: Plants That Thrive No Matter What
Artemisia - Plants with colorful foliage such as artemisia will keep the garden looking good while flowering plants go in and out of bloom. Artemisia has beautiful silver-gray foliage that won’t fade in the hot sun. This hardy perennial is also drought and insect resistant. Height varies by variety and can range from 3 feet tall to just 5 inches. Grows in Zones 4-9. Good for around chickens!
Liriope, also known as Monkey Grass is generally used as an edging plant for gardens and walkways. However, this grass-like perennial can also be planted in clumps as a groundcover. Liriope is a hardy plant, growing in full sun to partial shade; it requires little care and can tolerates humidity, heat and drought. Once you have Liriope established in your flower bed, you don’t have to keep buying new plants.
Agapanthus - love these! Agapanthus is a landscape staple in warm-winter regions, and it's no wonder why. This easy-to-grow perennial produces colorful globes of blue or white trumpet-shape flowers in summer and fall. Its evergreen strappy leaves add texture to beds, borders, and containers. Agapanthus blooms best in a spot where it gets full sun and has moist, well-drained soil.
shade garden - Fire and Ice Hosta! The leaves are slightly curled on this mostly white hosta that has green edges. small to medium size that only grows 8-10" and like other hostas prefers a shaded planting location. Planting tip: Hostas are great for covering withering spring bulb foliage of tulips, daffodils etc! Perennial in Zones 3 - 8. Hosta bulb size This item willl Bloom/Grow Summer