Botanical Name: Lobelia erinus ‘Techno® Dark Blue’ Common Name: Annual Lobelia Hardiness Zone: Grown as an Annual in All Climates Size: 6–10" Tall × 12–16" Spread Growth Habit: Dense, Mounding to Lightly Trailing Habit Sunlight: Full Sun to Partial Shade (Best Performance in Morning Sun / Afternoon Shade) Soil: Well-Drained, Moisture-Retentive Soil Water Needs: Moderate; Prefers Consistent Moisture Bloom Season: Spring through Early Summer (Extends Longer in Mild Weather) Fertilizer: Light, Regular Feeding for Best Flowering Features: Deep Navy-Blue Blooms, Excellent Color Saturation, Dense Flower Coverage, Uniform Habit Uses: Containers, Hanging Baskets, Window Boxes, Borders, Cool-Season Color

Patent: ✔ Patented Propagation: ❌ Propagation Prohibited Without License

More About Lobelia ‘Techno® Dark Blue’

Lobelia ‘Techno® Dark Blue’ delivers intensely dark, navy-blue flowers that provide strong contrast and depth in spring containers and mixed plantings. The blooms are packed densely across the plant, creating a rich block of color rather than a scattered or airy effect.

As part of the Techno® series, this variety was bred for uniform growth, strong branching, and consistent flowering, making it especially reliable for professional-quality container displays.

Why We Like It (Our Trials)

In our trials, ‘Techno® Dark Blue’ has performed exceptionally well in cool-season plantings, offering heavy early bloom and excellent color retention. With consistent moisture, it maintains a neat, balanced habit and continues flowering longer than many standard lobelias.

We especially appreciate its color depth. The dark blue reads almost velvety in mass plantings and pairs beautifully with whites, yellows, soft pinks, and silver foliage.

Lobelia ‘Techno® Dark Blue’ vs. Other Lobelia

Compared to varieties like ‘Rift Blue,’ ‘Techno® Dark Blue’ offers a slightly darker, more uniform blue tone with a tighter overall habit.

When compared to heat-tolerant selections such as ‘Hot® Purple,’ this variety excels in cooler temperatures, delivering denser bloom and stronger color earlier in the season. For gardeners seeking a refined, dark-blue lobelia with excellent spring performance, Lobelia ‘Techno® Dark Blue’ is an outstanding choice.