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.

Techno® Dark Blue vs. Other Lobelia Varieties

Techno® Dark Blue is prized for its reliability, uniform growth, and heavy early flowering. Unlike Rift Blue and Rift Purple, which trail more freely, Techno Dark Blue maintains a controlled, semi-mounded habit that works well in baskets, mixed containers, and mass plantings. Its deep blue color is saturated without being overpowering, giving it broad design versatility.

Compared to Magadi™ Compact Blue Bay, Techno Dark Blue offers slightly more movement while remaining predictable. It also feels calmer and more flexible than Hot® Purple, especially in professional or retail plantings. For gardeners seeking dependable performance with clean presentation, Techno Dark Blue is one of the safest and most versatile choices.