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Salvia cacaliifolia
Salvia cacaliifolia
(Blue Vine Sage) Blooming from mid-summer through late autumn, this semi-hardy herbaceous perennial is adorned with a profusion of true-blue flowers that arch up 12 to 24 inches above its deltoid, grass-green leaves.
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Results for true-blue from the blog

Salvias Down South
1. Salvias Down South: Tough Texans Sing the Blues
Blue Salvias bring peace to flower gardens. True blues, such as West Texas Grass Sage (Salvia reptans), are especially eye-catching. The same anthocyanins that make berries a healthy dietary choice also give them their colors. Similarly these chemicals create the wide variety of blues, purples and reds in the petals of flowers such as Salvias. Flowers by the Sea offers six varieties of tough Texas sages that can help you create a soulful garden bursting with blue. Drought-resistant and long-blooming, they grow happily in USDA plant hardiness zones 8 to 9, with some flourishing in areas as cool as Zone 4 and as hot as Zone 11.
Getting Started with Salvias
2. Getting Started: How Much Water Salvias Need
Salvias may need little or lots of water depending on species and local growing conditions. Many are drought resistant, getting by on less than an inch a week. Learn about the many kinds of Salvias, also called sages, at Flowers by the Sea. We're an online, mail-order nursery specializing in sages.