Thai Double Sky Blue Butterfly Pea is a heat-loving vining cultivar of Clitoria ternatea that produces rare powder blue double blooms from 75 to 90 days after planting. This vigorous climber thrives in full sun across zones 10 and 11, or as an annual in cooler regions, creating a striking wall of serene sky blue flowers. Beyond its ornamental appeal, the flowers steep into a lovely herbal tea, making this heirloom variety both beautiful and functional in the garden.
6
Full Sun
Moderate
10-11
?in H x ?in W
—
High
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The powder blue double blooms of this variety are genuinely unusual; the pale, powder-soft shade is far more delicate than the typical bright blue butterfly pea flowers you might encounter elsewhere. It's a vigorous climber that will fill a trellis quickly in heat, and it brings both visual drama and culinary possibility to the garden. The flowers transition into a soothing cup of tea, adding a layer of usefulness to an already eye-catching plant.
The flowers are harvested for steeping into a delicate, herbal tea. Beyond the cup, the blooms serve as a striking ornamental feature on trellises and arbors, where their powder blue color creates a serene focal point in the garden.
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Start seeds indoors in temperatures between 70 and 85 degrees Fahrenheit. Sow seeds at a depth of 1 inch. Seeds sprout in 7 to 21 days. Transplant outdoors after the last frost date in your region.
Transplant hardened seedlings outdoors after all danger of frost has passed. Space plants 6 to 12 inches apart in full sun. Ensure soil pH is between 6.0 and 7.5 before planting.
Direct sow seeds outdoors in full sun after the last frost date, planting them 1 inch deep and spacing 6 to 12 inches apart.
Harvest flowers for tea once they have fully opened and display their characteristic powder blue color. Pick blooms in the morning when they are freshest. Flowers can be dried for later use or steeped fresh in hot water.
Prune to manage the vine's vigorous growth and direct it along your trellis or support structure. Pinching back early growth encourages branching and fuller coverage.
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