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PlantFiles: Blue Throatwort
Trachelium caeruleum

 
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Family: Campanulaceae (kam-pan-yew-LAY-see-ay) (Info)
Genus: Trachelium (trak-ELL-ee-um) (Info)
Species: caeruleum (see-ROO-lee-um) (Info)

One vendor has this plant for sale.

One member has or wants this plant for trade.

Category:
Perennials

Height:
36-48 in. (90-120 cm)

Spacing:
36-48 in. (90-120 cm)

Hardiness:
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
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)
USDA Zone 11: above 4.5 °C (40 °F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Danger:
Handling plant may cause skin irritation or allergic reaction

Bloom Color:
Blue-Violet

Bloom Time:
Mid Summer
Late Summer/Early Fall

Foliage:
Evergreen
Smooth-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping

Soil pH requirements:
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
7.9 to 8.5 (alkaline)

Propagation Methods:
From softwood 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
Properly cleaned, seed can be successfully stored

By jkom51
Thumbnail #1 of Trachelium caeruleum by jkom51

By RichSwanner
Thumbnail #2 of Trachelium caeruleum by RichSwanner

By RonniePitman
Thumbnail #3 of Trachelium caeruleum by RonniePitman

By chunghsia
Thumbnail #4 of Trachelium caeruleum by chunghsia

By chunghsia
Thumbnail #5 of Trachelium caeruleum by chunghsia

Profile:

2 positives
No neutrals
No negatives

Gardeners' Notes:

RatingAuthorComment
Positive gardenbeads On May 16, 2006, gardenbeads from Warren, MI
(Zone 5a) wrote:

This plant is commonly called Blue Lace flower or Blue Throatwart. It is a tender perennial and does not overwinter in Michigan but can be grown as an annual. It will grow to about 2 1/2 feet high and has a bush-like habit. It flowers continuously from summer to fall and does best in sun/part shade. A great cut flower, one of my favorites.

Positive jkom51 On Nov 22, 2002, jkom51 from Oakland, CA
(Zone 9b) wrote:

Beautiful flower heads on slender stems; plant needs some staking when it gets to full 3' height. Flowerheads are fragrant, very similar to lilac with a vanilla scent. Excellent as cut flowers.

Regional...

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

Martinez, California
Norwalk, California
Sacramento, California
Santa Clara, California
Soquel, California
Warren, Michigan
Austin, Texas



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