Blue Star Creeper, Laurentia, Rock Isotome
Isotoma axillaris

Family: Campanulaceae (kam-pan-yew-LAY-see-ee) (Info)
Genus: Isotoma (Eye-SOT-oh-muh) (Info)
Species: axillaris (ax-ILL-ar-iss) (Info)
Synonym:Solenopsis axillaris
Synonym:Laurentia axillaris

Category:

Annuals

Perennials

Height:

6-12 in. (15-30 cm)

Spacing:

9-12 in. (22-30 cm)

Hardiness:

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:

Sun to Partial Shade

Danger:

All parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Light Blue

Medium Blue

Dark Blue

Bloom Time:

Late Spring/Early Summer

Mid Summer

Late Summer/Early Fall

Blooms repeatedly

Foliage:

Grown for foliage

Other details:

Average Water Needs; Water regularly; do not overwater

This plant is suitable for growing indoors

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:

Non-patented

Propagation Methods:

From herbaceous stem cuttings

From seed; sow indoors before last frost

Seed Collecting:

Bag seedheads to capture ripening seed

Collect seedhead/pod when flowers fade; allow to dry

Allow pods to dry on plant; break open to collect seeds

Allow seedheads to dry on plants; remove and collect seeds

Properly cleaned, seed can be successfully stored

Regional

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

Long Beach, California

San Francisco, California

Santa Rosa Beach, Florida

Derby, Kansas

Brookline, Massachusetts

Omaha, Nebraska

Charlotte, North Carolina

Akron, Ohio

Cincinnati, Ohio

Lynchburg, Ohio

Monmouth, Oregon

Portland, Oregon

Dallas, Texas (2 reports)

Berkeley Springs, West Virginia

show all

Gardeners' Notes:

7
positives
3
neutrals
0
negatives
RatingContent
Positive

On Dec 7, 2010, Get_growing from Dallas, TX wrote:

Put 3 in border last spring. Pretty 'true blue" flowers with lovely delicate foliage. Grown by Proven Winners and sold as laurentia, 'Beth's Blue' Star Flower. Plant tag indicates hardy zones 7-10 (to 0 degrees F), blooms "planting to frost," normal water, full sun, heat tolerant. Hope this helps clarify some issues.

Mulched heavily (3+ inches) and it made through 5 straight days of freezing weather! It's already in bloom again as of early May, 2011. No mealy bug problem despite major infestation on other plants last spring, e.g., roses, crepe myrtle, and more.

Love this plant!!!

Positive

On Oct 3, 2009, Aschnapp from Santa Rosa Beach, FL wrote:

Ihave grown laurentia Beth's Blue only this summer in the panhandle of Florida. I had to go to St. Louis to buy the plant because no one had heard of it in any of the nurseries I went to here. They were doing great until this week. One plant completely died out and the others are on their way.........I discovered that they were loaded with mealy bugs. Has anyone had experience with laurentia getting mealy bugs? There is no need to spray as with my experience mealy bugs are very hard to control and these plants are loaded. Plants surrounding these do not have that problem. Anyone else experiencing this problem? Is this a problem with laurentia?

Neutral

On Jun 26, 2007, Roy_Green from Adelaide Hills
Australia (Zone 9a) wrote:

This is an elegant Australian native with gorgeous star-like flowers. Mine did well in our Zone 9a garden (South Australian hills) throughout the growing seasons, and coped well with very hot summer days, but unfortunately a few frosts wiped it out in winter. I would say it is only hardy to zone 9b at the lowest.

Positive

On Sep 24, 2006, roxlobster from Brookline, MA wrote:

I have grown this from T&M seed for two years -- first just the blue, then the mix of blue, pink, and white. I did not succeed in getting any of the white to germinate, but T&M did say they take longer, and I waited as long as I had the patience for. The blue is my favorite, so I didn't mind. I started seed in Jan and had blooms by early summer and they're still going in Sept. I adore this plant and everyone who walks by asks about it -- huge mounds of finely cut foliage covered in star-shaped blooms. While they don't need deadheading, I find that a sort of "thinning" sheering in mid-season kept my plants more compact and full of blooms longer. (I trimmed perhaps a third of the branches back, here and there amongst the blooms.) I've collected seed this year and will see what comes u... read more

Positive

On Jun 6, 2004, kplinn52 from Portland, OR wrote:

I had a Blue Star Solenopsis in my garden last year and it bloomed beautifully all summer. We suffered a bitter freeze this last winter and there is no sign of it coming back. It is a beautiful soft true blue color worth every effort.

Positive

On Jul 14, 2003, corrinawillamin wrote:

I know this plant as Solenopsis, or blue-star laurentia. It grows beautfully in Ottawa, Canada (Zone 4-5) as an annual. It grows in a lovely little mound, and flowers all summer long. I had no luck harvesting any seeds, however.

Neutral

On May 23, 2003, mavv wrote:

Beautiful plant. I am however a little confused. The tags on my Blue star Laurentia calls it a perrenial. This info says its an annual. Can anyone help with this??
zip 92503

Positive

On Jan 3, 2003, acroton wrote:

I grew Laurentia in 2002 in zone 5 (Nfld. Canada) and was very pleased with the results. It was excellent in planters and as an edging to borders. It's only drawback is the long season needed before it flowers (Feb. to August), but it continued on until near Xmas. I was able to obtain seeds from a plant growing in a sunroom and they germinated well in December indoors. Looking forward to the colours derived from a self-seeded blue variety. The only problem is why it has so many names: Laurentia axillaris (T & M), Isotoma axillaris, or Solonopsis axillaris(Reader's Digest A-Z Encyclopedia)?.


Positive

On May 29, 2002, astersia from Johnston, IA (Zone 5b) wrote:

Have grown repeatedly as an annual in USDA zone 5. Must start early (mid February) for blooms by June. Lovely, finely dissected 'ferny' foliage and starry flowers in blue, pink, white that continue all seaon without need for deadheading. Except for the length of time from seed to bloom, it is easy to start from seed. Wonderful in containers, as edging, in rockery. No diseases or pests to speak of, and not eaten by rabbits, so far.

Neutral

On Aug 31, 2001, Badseed from Hillsboro, OH (Zone 6a) wrote:

This plant belongs to a genus of approx. 25 species, grown on dry, exposed sites in Australia, Central and South America. Where not hardy, it can be grown in a greenhouse, or as a bedding plant. Blooms heavily from spring to autumn.