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PlantFiles: Blue Throatwort
Trachelium caeruleum 'Jemmy Royal Purple'

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

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:
Unknown - Tell us

Bloom Color:
Purple

Bloom Time:
Mid Summer
Mid Fall

Foliage:
Evergreen
Smooth-Textured

Other details:
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Suitable for growing in containers

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

Patent Information:
Unknown - Tell us

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

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

Click thumbnail
to view:

By Kell
Thumbnail #1 of Trachelium caeruleum by Kell

By Kell
Thumbnail #2 of Trachelium caeruleum by Kell

Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorComment
Neutral Kell On Dec 3, 2007, Kell from Northern California, CA (Zone 9b) wrote:

This colorful perennial is grown for the florist industry because the cut flowers last up to 2 weeks in water. It has 3 foot flower spikes with 6 inch across blooms. It reblooms with pruning. Grow in part sun where hot, full sun where cooler and in well draining soil. Add to a combo pot. Grow in your butterfly garden!

Regional...

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

San Leandro, California



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