Riviera Marine Blue Lobelia

Riviera Marine Blue is a compact Lobelia erinus selection with ball-shaped, mounded growth and blue flowers. PanAmerican Seed identifies it as part of the Riviera Series, an extra-early group that starts flowering roughly 15 days before standard varieties. ## Size and use The official [Riviera Marine Blue profile](https://www.panamseed.com/products/039301263003155/lobelia-riviera-marine-blue/) lists a 5-inch height, an 8-inch width, and 8–10 inches between plants. It blooms in early spring and spring and suits beds, borders, containers, and color bowls. The same profile recommends partial sun and identifies the plant as compact lobelia with a mounded habit. ## Growing conditions Plant in organically rich, moist, well-drained soil and keep the roots consistently watered. North Carolina Extension describes Lobelia erinus as a cool-season performer that may decline in hot or humid summers; it does not tolerate drought. The extension’s [species profile](https://plants.ces.ncsu.edu/plants/lobelia-erinus/) lists hardiness in zones 10a–11b and gives general guidance on soil moisture and light. ## Maintenance Water regularly, especially in containers, while allowing excess water to drain freely. If flowering and foliage fade in summer, trim the plant back after bloom to encourage new growth. Its rounded form works well in small groups or near the edge of a mixed container.