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PlantFiles: Edging Lobelia, Annual Lobelia, Trailing Lobelia
Lobelia erinus 'Regatta Midnight Blue'

Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Lobelia (low-BEE-lee-a) (Info)
Species: erinus (EAR-rin-us) (Info)
Cultivar: Regatta Midnight Blue
Additional cultivar information: (Regatta series)

3 vendors have this plant for sale.

3 members have or want this plant for trade.


under 6 in. (15 cm)

3-6 in. (7-15 cm)

Not Applicable

Sun Exposure:
Sun to Partial Shade

All parts of plant are poisonous if ingested

Bloom Color:
Dark Blue

Bloom Time:
Mid Summer
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:

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

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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By jg48650
Thumbnail #1 of Lobelia erinus by jg48650

By Fro_Bro26
Thumbnail #2 of Lobelia erinus by Fro_Bro26


3 positives
No neutrals
No negatives

Gardeners' Notes:

Positive mehitabel45 On Oct 14, 2013, mehitabel45 from Whidbey Island, WA (Zone 8b) wrote:

I often use this in my window boxes. They get shade until the afternoon, and then about 4-6 hours of sun, but our afternoon temps seldom get above 80, so they thrive until hard frost hits in November. Every now and then, I just take the scissors to them, and they just keep on coming. Gorgeous blue, and I like it better than the Sapphire, which has a distinct white eye.

Positive ogon On May 10, 2011, ogon from Paradise, CA (Zone 9a) wrote:

I planted trailing lobelia in a pot containing a sego palm that I overwinter in a well-lit shed for frost protection. Even though they're hardy in zone 9, winter frost tends to make segos lose their outer leaves so I prefer to protect mine. Not only did the "annual" lobelia survive the winter in the shed, it thrived and has taken over most of the pot. We'll see if it keeps going this winter too!

Positive troop1819 On Nov 1, 2010, troop1819 from Lees Summit, MO wrote:

I really like this plant when in full bloom and it is a nice addition to a hanging basket if it is a shade loving basket. In my area they are sold as a 'sun annual' but do not survive midwest heat in July and August. I did plant some under our river birches this year on the east side of the house, and they got a little scraggly in the heat of the summer but have bounced back with cooler temps and are blooming away again, are a nice complement to Dahlberg Daisies.


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

Chico, California
Paradise, California
Wamego, Kansas
Grand Rapids, Michigan
Lees Summit, Missouri
Mooresville, North Carolina
Freeland, Washington

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