Common name: Rosemary
Botanical name: Rosmarinus officinalis
Rosemary is hardy in full sun areas where winter temperatures do not drop below 10 degrees F. Rosemary is evergreen and makes a great aromatic hedge, 4'-6' tall and 2' wide. Foliage is used in cooking. Blue flowers appear in summer. This plant is drought tolerant once it's established. Bees love Rosemary!
Common name: Scabiosa
Botanical name: Scabiosa caucasica
A perennial that grows to 1' to 2' tall, 2'-3' wide, therefore used as edgings or borders. Lavender or blue or white flowers appear on stiff, thin stalks among the foliage during the summer. Flowers look like pincushions, thus the common name. Foliage is gray green, narrow and lance-shaped. This plant does best in full sun with well draining soil. Does not tolerate high heat and humidity. Prune spent flowers to encourage more blooms.
Common name: Society Garlic
Botanical name: Tulbaghia violacea
This clumping perennial will grow less than 1' tall and has narrow, blue green leaves. Clusters of lavender flowers bloom in spring and summer. Leaves and flowers have a distinct onion or garlic smell if crushed.
Common name: White Gaura
Botanical name: Gaura lindheimeri
White Gaura is a profusely flowering perennial for all zones; it grows 2'-4' high and 2' wide. It has pink buds that open to showy white flowers in spring through fall. It needs full sun and does best in sandy or loamy soil that is well draining. Established plants are drought tolerant. Leaves are narrow, tiny and lance-shaped. Breezes cause flowers to move on stems, resembling butterflies flickering. Prune in spring to control height, if desired. Does best in hot and dry areas.