Beth's Blue® Star Flower

Beth’s Blue® star flower is a compact annual with fine green foliage and violet-blue, star-shaped blooms. Proven Winners lists this exact plant at 12–14 inches tall and 10–14 inches wide, flowering from spring into summer. ## Form and placement The gently mounded plants add a soft, airy texture at the front of a border or as a filler in containers. The [Proven Winners plant page](https://www.provenwinners.com/plants/isotoma/beths-blue-star-flower-isotoma-axillaris) gives the selected plant’s mature size, sunlight, bloom season, heat tolerance, and hardiness range. The [University of Wisconsin–Madison Extension profile](https://hort.extension.wisc.edu/articles/laurentia-isotoma-axillaris/) identifies Beth’s Blue® as a vegetative selection of *Isotoma axillaris* and describes its blue flowers, mounded habit, and use in borders and containers. The species is a tender perennial, commonly grown as an annual in colder climates. ## Growing conditions Plant after frost in full sun and average, well-drained soil. This selection tolerates heat and blooms through warm weather; in very hot climates, consistent moisture helps it remain vigorous. Its small scale works well in mixed containers, edging, and massed along a path. ## Maintenance Spent flowers drop without deadheading. Water during extended dry periods and trim lightly if the mound becomes loose or overgrown.