Ensign Mix
Convolvulus tricolor, commonly called dwarf morning glory, is a Mediterranean native annual that brings Mediterranean charm to gardens across hardiness zones 2-11. This low-growing, bushy plant reaches just 12-18 inches tall and wide, producing showy trumpet flowers with a striking tri-color pattern: brilliant blue petals surrounding a white throat and golden yellow center. Each flower lasts just one day, but they bloom in continuous succession from June through September, creating an extended display with virtually no fuss. Its drought tolerance and low maintenance needs make it an excellent choice for gardeners seeking reliable, easy-to-grow color.
Full Sun
Moderate
2-11
18in H x 18in W
Annual
High
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The tri-colored flowers are the real draw here, each one a miniature trumpet arrangement of blue, white, and yellow that echoes the larger morning glories but in a compact, tidy package. Unlike its vining cousins, this bindweed grows as a self-contained bushy plant, spreading only 12-18 inches wide, which means you can tuck it into tight spaces, containers, or garden edges without it taking over. Established plants laugh at heat and drought, requiring just moderate water and full sun to produce blooms relentlessly through late summer.
Convolvulus tricolor serves ornamental purposes exclusively, deployed in annual beds, borders, containers, and as edging along pathways where its compact mounding habit adds color without requiring staking or tying. The showy blue and yellow flowers attract attention in cottage-style gardens and mixed containers, where their uniform height and spread simplify design. In warmer climates where it may overwinter, gardeners sometimes treat it as a long-season performer, allowing it to persist as a semi-permanent feature.
Sow seeds indoors in pots 4-6 weeks before your last spring frost date. Maintain a soil temperature of 65-80°F for optimal germination. Transplant seedlings into small pots and grow under bright light until they're ready to harden off.
Harden off seedlings by gradually exposing them to outdoor conditions over 7-10 days before transplanting. Move them into the garden after the last frost date has passed. Space plants 12 inches apart with 18 inches between rows in full-sun locations with average, well-drained soil.
For direct sowing, plant seeds outdoors several days before your last spring frost date, as this variety tolerates light frost exposure during germination. Sow directly into prepared soil at the spacing noted above.
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“Native to the Mediterranean region, Convolvulus tricolor arrived in gardens as a botanical curio, prized for its resemblance to the more flamboyant morning glories yet contained in a far more manageable form. Gardeners in temperate climates recognized its potential as a reliable annual, while those in warmer zones (USDA 9-11) discovered it could linger as a short-lived perennial through mild winters. Its journey from Mediterranean hillsides to seed catalogs reflects a centuries-old tradition of bringing Mediterranean plants northward, where gardeners adapted them to seasonal growing.”