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PlantFiles: Edging Lobelia, Annual Lobelia, Trailing Lobelia
Lobelia erinus

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Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Lobelia (low-BEE-lee-a) (Info)
Species: erinus (EAR-rin-us) (Info)

8 members have or want this plant for trade.

Category:
Annuals

Height:
under 6 in. (15 cm)

Spacing:
6-9 in. (15-22 cm)

Hardiness:
Not Applicable

Sun Exposure:
Full Sun

Danger:
All parts of plant are poisonous if ingested

Bloom Color:
Pink
Rose/Mauve
Medium Blue
White/Near White

Bloom Time:
Mid Summer
Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter

Foliage:
Bronze-Green

Other details:
This plant is attractive to bees, butterflies and/or birds
This plant is suitable for growing indoors
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season
Suitable for growing in containers

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

Patent Information:
Non-patented

Propagation Methods:
From seed; direct sow after last frost

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Properly cleaned, seed can be successfully stored

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There are a total of 18 photos.
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Profile:

10 positives
3 neutrals
No negatives

Gardeners' Notes:

RatingAuthorContent
Positive sunkissed On Mar 29, 2014, sunkissed from Winter Springs, FL (Zone 9b) wrote:

Trailing Lobelia in Florida does well in late winter and spring. You'll start seeing is as early as late January in the garden centers, but nout usually until Feb. and March. It does very nice as a filler in pots and will thrive until we hit summer heat and rains, then it will usually die out. There is no need to fear of it being invasive, just an annual here, maybe I should say semi annual, since it won't make it through the hot summer. That said it makes a real stand out in the spring garden, and it can take pretty cold temperatures in winter, if you can find it that early. I never pay more than a buck for a small pot since it will quickly grow and make a nice hanging basket or filler for containers. A must in my garden for spring eye candy.

Positive AmyInNH On Oct 8, 2012, AmyInNH from Brookline, NH wrote:

Great luck with this in NH so long as it's shielded from the worst mid-day sun. Planted north/northeast facing and blocked from any sun past morning, it's still blooming its little guts out in mid-October. I'm mad for this each spring and have also grown it inside in windows with pretty good luck.

Neutral nativelyeager On Oct 8, 2012, nativelyeager from Brooksville, FL wrote:

Just a note of hope for caution....Someone posted a 'positive' saying "throw it in the ground and watch it thrive." For someone like me who loves plants but believes it's critical to protect natural ecosystems, these words set up 'red flags'. Please be careful with such plants if you are anywhere near a natural area. Any seed of any plant which can find its own way, moved by wind or water or hitch-hiking with critters (on fur or feathers or in their poop) into an area far from its native one, has the potential, when so easily propagated, to change the new habitat.

Positive otter47 On Mar 26, 2010, otter47 from Livermore, CA wrote:

Since I adore truly royal blue flowers, this lobelia is a must for my garden. Crystal Palace, Cobalt, and Riviera Midnight are my favorite varieties. I grow it in pots, hanging baskets and in the ground (in loose, fertile soil). It grows best in the cooler months of the year and wears out if we have too many hot spells in summer. I usually buy it in six-packs but occasionally grow my own from seed. Yes, the seed is exceedingly tiny and the young plants need nurturing. I sow it in late spring to have fresh plants for autumn. If the winter is not too cold, these plants survive and bloom when the days begin to lengthen. Occasionally, I have self-sown plants crop up. Lobelia erinus is a jewel of a plant and worth the effort.

Positive darylmitchell On Jun 29, 2009, darylmitchell from Saskatoon, SK (Zone 3a) wrote:

I've had mixed results with this lobelia. Last year I planted in the ground where it produced some flowers, but also looked leggy with blackened foliage. This year I put it in a container that gets morning sun and afternoon shade. I've had vigourous, healthy plants and a profusion of blooms. My guess is that it doesn't appreciate clay soil.

Positive Sabrina1978 On May 30, 2008, Sabrina1978 from Gibsonburg, OH wrote:

I love, love, love, this annual. There are a few colors my local greenhouse carries. I like the blue moon, sky moon, half moon (in blue of course)....I like that the foliage has a more reddish hue as it ages.
.I have clay soil that is neutral to slightly alkaline. I have planted this two years in a row in hot sunny dry southern exposure here in zone 5 NW OH. It does need water in the dog days but a wonderful addition to any garden.

Very neat and compact-great color.

Positive yerboyhowdy On May 4, 2008, yerboyhowdy from Seattle, WA (Zone 5b) wrote:

This is my favorite "throw it in the ground and watch it thrive" plant. A few minutes of work turns into a cascade of green foliege and blue flowers that asks only to be kept moist (a couple times a month chore here in Seattle), and comes back strong as ever the next year. I've had great luck with it blooming in low sun to partial shade.

Positive lmelling On May 16, 2005, lmelling from Ithaca, NY (Zone 5b) wrote:

One of my favorite annuals. In our area Zone 5b, I use lobelia in areas that get only a couple of hours of morning sun or bright shade (to the side of a birds nest spruce and in my shade garden), and they bloom from late spring sometimes all the way through till frost! Wonderful to look out and see those bright blue flowers waving back! Favorites are Midnight Rivera and Blue Moon.

Positive punaheledp On Jul 2, 2004, punaheledp from Kailua, HI (Zone 11) wrote:

I also planted "crystal palace" some problem with germination (might be slugs) but the one that grew made it worth it. "Charming" comes to mind. It's in the ground next to a lavender alyssum, nice together. Folliage starts green, turns reddish-purple. Flowers purple-blue w/white center. will see if it survives summer heat (zone 11). Will be trying again for more of these. Tiniest seeds I've ever seen, dust is bigger.

Positive youreit On Mar 16, 2004, youreit from Knights Landing, CA (Zone 9b) wrote:

If there was a "Positive times 10" rating, I would choose it for this plant. I planted 'Crystal Palace' last fall, and this supposed annual is blooming AGAIN. This after a season of unusually wet weather, with freezing temps down to about 30 F a few times between precipitous days. The soil is quite clay-like, and it gets rather baked on hot, dry days like today, but there they are, those electric blue flowers and the thick green-bronze foliage, waving at me in the front yard.

Neutral dogbane On Dec 11, 2003, dogbane from New Orleans, LA (Zone 9a) wrote:

I love the electric blue color of these. In my zone, this lobelia is a cool season annual. It performs unpredictably because it can't tolerate wet, cold conditions. In dry winters it puts on a splendid display for months. Winters with lots of rain, they rot away in days.

Positive tredduk On Oct 9, 2002, tredduk wrote:

Although in previous years this plant has never worked for me, this year it excelled. I think the answer was to put it in full sun (bearing in mind that I live in Wales (UK), so my kind of full sun has clouds in it) and I gave it good drainage, regular watering & fresh from the bag compost to root in. It spread like wildfire, covering the centre of my lawn with a constantly reflowering mass of blue which the bees and butterflies appreciated no end. Despite previous failures then, I think I've cracked it & will definately pursue this in future seasons...particularly in a cascade of pots I think...but that's a comment for the future if it works.

Neutral LerayJ On Nov 7, 2001, LerayJ wrote:

Color: RIVIERA MIDNIGHT BLUE:
Light Requirements:zone 9-10 = SHADE TO PART SHADE
Hight: 5 inches
Uses:EDGINGS, ROCK GARDENS, WINDOW BOXES.
Care: WELL DRAINED BUT KEEP MOISTED IN HOT WEATHER.

Regional...

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

Casa Grande, Arizona
Elk Grove, California
Knights Landing, California
Livermore, California
Oakland, California
Miami, Florida
Milton, Florida
Pompano Beach, Florida
Port Charlotte, Florida
Winter Springs, Florida
Honolulu, Hawaii
Kailua, Hawaii
New Orleans, Louisiana
Brookline, New Hampshire
Clifton Park, New York
Elizabeth City, North Carolina
Batavia, Ohio
Gibsonburg, Ohio
Georgetown, Texas
Rowlett, Texas
San Antonio, Texas
Sour Lake, Texas
Freeland, Washington
Seattle, Washington



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