Photo by Melody

PlantFiles: Edging Lobelia, Annual Lobelia, Trailing Lobelia
Lobelia erinus 'Techno Heat Light Blue'

Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Lobelia (low-BEE-lee-a) (Info)
Species: erinus (EAR-rin-us) (Info)
Cultivar: Techno Heat Light Blue
Additional cultivar information: (aka Tech Helitbule, Techno™ series)


6-12 in. (15-30 cm)

12-15 in. (30-38 cm)

Not Applicable

Sun Exposure:
Full Sun
Sun to Partial Shade

All parts of plant are poisonous if ingested

Bloom Color:
Light Blue
White/Near White

Bloom Time:
Blooms repeatedly


Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information:
Unknown - Tell us

Propagation Methods:
From herbaceous stem cuttings
From seed; sow indoors before last frost
From seed; direct sow after last frost

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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2 positives
No neutrals
No negatives

Gardeners' Notes:

Positive otter47 On Apr 2, 2013, otter47 from Livermore, CA wrote:

This plant looks like the more familiar edging lobelia, Lobelia erinus, but "on steroids". It has larger flowers, larger leaves, and grows larger in height and width. But the main attribute is that it is more heat resistant. Mine survive all summer in a warm part of the Bay Area, and just bloom and bloom and bloom. They are also available in other blue shades. It is good in pots or in borders, where it mixes well and weaves into other plants. I'm not sure how it is propagated; I imagine it is grown from cuttings,

Positive sunkissed On Jan 25, 2011, sunkissed from Winter Springs, FL (Zone 9b) wrote:

I found this at my local nursery last spring (2010) in one of those little .89 cent pots. I bought two of them to use as fillers in a larger pot of other annuals. If I had known how nice they'd look as fillers in a pot and how long they'd last I would have bought more. I went back to get more a month later and never could find any. I'll make sure to look for them again this year. That one small little pot filled in beautifully (I posted some pictures) actually took over the pot eventually when the other early spring annuals had died out. I bought a third in a darker shade of purple which you can also see in the picture, not sure what kind it was, but it didn't fill in as much or last as long as the light blue Techno did. Also did very well in full sun and didn't require to be watered as often. Constant blooms from March through about July when the heavier rains finally did them in.


This plant has been said to grow in the following regions:

Livermore, California
Winter Springs, Florida (2 reports)
Houston, Texas

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