Regatta Blue Splash Lobelia

Regatta Blue Splash is a trailing Lobelia erinus with blue flowers and a cascading habit. Its 6–8-inch height and 10–12-inch spread suit hanging baskets, containers, and the front of a border. The Regatta series flowers early in spring, while edging lobelia as a species favors cool weather and may slow when heat arrives. ## Garden use PanAmerican Seed’s catalog lists Regatta Blue Splash among the trailing lobelias and describes the Regatta series as early flowering, vigorous, and suited to baskets and larger containers. Use this selection where its cascading stems can spill over a low wall or planter edge, or as a seasonal border accent. The [2016 PanAmerican Seed catalog](https://www.panamseed.com/documents/catalogs/14520_PASKieft_2016Catalog-LowRes.pdf) identifies the exact Blue Splash selection and the series’ 6–8-inch height and 10–12-inch spread. ## Growing conditions Plant in full sun to part shade in organically rich, moist, well-drained soil. In warm climates, afternoon shade can help extend flowering; water containers before they dry out. [Illinois Extension](https://extension.illinois.edu/flowers/lobelia) notes that edging lobelia thrives in cooler weather and may stop blooming in heat. [NC State Extension](https://plants.ces.ncsu.edu/plants/lobelia-erinus/) describes spring flowering, moist soil needs, and hardiness in USDA zones 10–11; in colder regions it is commonly grown as an annual. ## Maintenance Keep soil evenly moist through active growth and remove worn stems to refresh the display. Replace the plant after frost or when summer heat ends flowering. NC State Extension notes toxicity for Lobelia erinus; do not eat it and keep it away from children and pets.