USDA hardiness zones 6 through 8 include the states of Missouri, Pennsylvania, Tennessee, Oklahoma, Virginia, Arkansas, Georgia and Texas, to name a few. These zones are defined as having lows ranging from -10 to 20 degrees Fahrenheit.
Yarrow (Achillea millefolium) varieties are low growing perennial plants that produce small colorful blooms. Varieties for these hardiness zones include Apple Blossom, Ortel's Rose, Paprika, Summer Pastels, Terra Cotta and Anthea Yellow. Yarrow are drought tolerant, thrive in full sun exposure and prefer neutral soil.
Dwarf Red Buckeye
A deciduous shrub that forms clumps of flowers, Dwarf Red Buckeye (Aesculus Pavia) is a native plant to these hardiness zones. The dark pink blooms on this tree are attractive to humming birds and deer resistant. The Dwarf Red Buckeye typically grows to a height of 10 to 20 feet and prefers moist soil with full sun exposure.
Blue Star (Amsonia) is a perennial with many varieties that flourish in hardiness zones 6 through 8. These wildflowers are deer and drought resistant, have excellent fall color and thrive in full sun. Varieties that thrive in hardiness zones 6 through 8 include Dwarf (Amsonia montana), Stiff Blue Star (Amsonia rigida), Willow Amsonia (Amsonia tabernaemontana) and Blue Ice (amsonia tabernaemontana). As with all wildflowers, these plants produce and can be grown from seeds.
Columbine (Aquilegia canadensis) is a stunning wildflower that can be sewn from a seed and is found natively in hardiness zones 6 through 8. Columbine are hummingbird attractors, so they are excellent for placing in backyard gardens. Columbine can grow well in areas ranging from full sun to mostly shady and are drought tolerant. Columbine are a perennial, self sewing plant, so they will grow well with very little care and maintenance. Varieties for hardiness zones 6 through 8 include Dwarf Yellow, Little Lanterns, and Standard Columbine.