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PlantFiles: Yellow Archangel
Lamium galeobdolon subsp. montanum 'Florentinum'

 
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Family: Lamiaceae (lay-mee-AY-see-ay) (Info)
Genus: Lamium (LAY-mee-um) (Info)
Species: galeobdolon subsp. montanum
Cultivar: Florentinum

Synonym:Lamiastrum galeobdolon

2 members have or want this plant for trade.

Category:
Groundcovers
Perennials

Height:
6-12 in. (15-30 cm)

Spacing:
18-24 in. (45-60 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)
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)

Sun Exposure:
Sun to Partial Shade
Light Shade

Danger:
Unknown - Tell us

Bloom Color:
Bright Yellow

Bloom Time:
Late Spring/Early Summer
Mid Summer

Foliage:
Grown for foliage
Herbaceous
Variegated

Other details:
May be a noxious weed or invasive
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From herbaceous stem cuttings

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

By FlowerManiac
Thumbnail #1 of Lamium galeobdolon subsp. montanum by FlowerManiac

By naturepatch
Thumbnail #2 of Lamium galeobdolon subsp. montanum by naturepatch

By philomel
Thumbnail #3 of Lamium galeobdolon subsp. montanum by philomel

By Happenstance
Thumbnail #4 of Lamium galeobdolon subsp. montanum by Happenstance

By Happenstance
Thumbnail #5 of Lamium galeobdolon subsp. montanum by Happenstance

By Happenstance
Thumbnail #6 of Lamium galeobdolon subsp. montanum by Happenstance

By MsMaati
Thumbnail #7 of Lamium galeobdolon subsp. montanum by MsMaati

Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorComment
Neutral Baa On Jan 27, 2003, Baa wrote:

A vigorous cultivar that increases rapidly and can become invasive.

Has ovate to diamond shaped, toothed leaves that have a striking silver varigation with clear green margins. Bears bright yellow, two lipped flowers spotted with maroon-brown inside.

Flowers June-September

Loves a well-drained soil in a shady area.

Regional...

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

Clayton, California
Chicago, Illinois
Newburgh, Indiana
Pinconning, Michigan
Lees Summit, Missouri
Osceola Mills, Pennsylvania
Emory, Texas
Alexandria, Virginia
Augusta, Wisconsin



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