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Lithodora
Lithodora diffusa

Family: Boraginaceae
Genus: Lithodora (lith-oh-DOR-uh) (Info)
Species: diffusa (dy-FEW-sa) (Info)

Category:

Alpines and Rock Gardens

Groundcovers

Perennials

Height:

6-12 in. (15-30 cm)

Spacing:

12-15 in. (30-38 cm)

Hardiness:

USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

Sun Exposure:

Full Sun

Sun to Partial Shade

Danger:

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Medium Blue

Bloom Time:

Late Spring/Early Summer

Mid Summer

Blooms repeatedly

Foliage:

Evergreen

Velvet/Fuzzy-Textured

Other details:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

Patent Information:

Non-patented

Propagation Methods:

From softwood cuttings

From seed; sow indoors before last frost

Seed Collecting:

Bag seedheads to capture ripening seed

Allow seedheads to dry on plants; remove and collect seeds

Regional

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

Berkeley, California

Brea, California

Dinuba, California

Northridge, California

Snellville, Georgia

Winterville, Georgia

Woodstock, Georgia

Schenectady, New York

Dallas, Oregon

Portland, Oregon

Salem, Oregon

Lancaster, Pennsylvania

Tunkhannock, Pennsylvania

Lake Forest Park, Washington

show all

Gardeners' Notes:

1
positive
2
neutrals
0
negatives
RatingContent
Neutral

On May 15, 2014, Roselle_Celina from Lancaster, PA (Zone 6b) wrote:

Bought 10 plants from Lowe's...of the 2 that struggled (lots of rain!), 1 bounced back, the other is in quarantine...will nurse it back to health.

Here's what I found out with extensive googling and trial and error...

LIKES:
full sun, ***fast draining soil***, acidic soil, pruning

HATES:
***wet roots***, branches sitting on wet soil

COMMON PROBLEMS:
Blackening or drying out in the middle--caused by too much watering. If the plant isn't too far gone, consider amending the soil by mixing in sand/pea gravel, moisture control soil and compost. Top dress with gravel, as the branches do not like to sit on wet soil.

NOTES:
I grow these little guys in flower boxes--1 or 2 per 24 inch flower box... read more

Neutral

On Nov 20, 2010, suewylan from North Fork, CA (Zone 7b) wrote:

This plant was not hardy in my Zone 7, garden with a bit of snow.

I saw 4 foot square drifts of it in NZ that were beautiful!

Positive

On Jul 27, 2003, apprentice from Pismo Beach, CA wrote:

I was glad I went to this website when searching for a periennial ground cover. I planted approx. 6 Lithodora around an "island" in the corner of our front yard. Its green leaves and pretty, bright blue flowers added such an elegant appearance to that once-boring island. Thank you for the valuable info you provide, esp. for "apprentices" like myself. Will update my comments when they've been in the ground a whole year.