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Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) 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)
Foliage: Grown for foliage Evergreen Herbaceous Silver/Gray Aromatic
Other details: May be a noxious weed or invasive Drought-tolerant; suitable for xeriscaping Average Water Needs; Water regularly; do not overwater Self-sows freely; deadhead if you do not want volunteer seedlings next season
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 seed; sow indoors before last frost
Seed Collecting: Allow seedheads to dry on plants; remove and collect seeds
On Apr 1, 2007, JoanJ from Belfield, ND (Zone 4a) wrote:
This plant is listed on the North Dakota invasive/troublesome list and this information is being distributed in a guide developed by the ND Weed Control Association and other agencies.
Plant Features
Perennial, up to 4 feet tall
Leaves 2 to 5 inches long, deeply divided, grayish in color from a distance
Single to multiple hairy stems from base
Previous years stems woody, erect
Crushed plants have a strong sage odor
Early spring emergence from seed or at the base of previous year's plants
Abundant, small, 1/8 inch yellowish flowers on the upper 2/3 of each stem
Blooms in July and August
Large taproot
Produces a very large amount of seed
Distribution
Widespread invasive found on disturbed sites in grasslands, roadsides, gravel pits, etc. Spreads mostly by seed through contaminated hay and equipment
Interesting Facts
Herb, used for sinus colds and liniments
Pollen considered an allergen
Bitter tasting, can taint milk if ingested
Sheep graze readily (crude protein 25%)
On Oct 16, 2006, justfurkids from Toone, TN (Zone 7a) wrote:
Years ago, I grew this plant at the request of my ex-husband in Pittsburgh PA. He used it to make homemade Absinthe, which tasted like Ouzo. Sorry, I don't remember the recipe.
On Nov 25, 2004, caron from Woodland Park, CO (Zone 4b) wrote:
Colorado Class B Noxious Weed. Mandatory eradication in all counties except Garfield.
All locations of this plant in Colorado should be immediately reported to the Colorado Department of Agriculture.
On Jul 14, 2004, Egglantinerose from Zionsville, IN wrote:
Hi Everyone,
I love wormwood. The aroma is what I like about it. The gray/green foliage is lovely against other plants.
I don't find it invasive.
Isn't this the plant they made the liquore Absinthe and it
was baned in almost all countries but France.
On Jul 13, 2004, CatskillKarma from West Kill, NY wrote:
Not at all invasive in my zone 4b garden with heavy clay soil. Very pretty. I use branches of it for discouraging moths in my clothes closet. It does not stand upright readily in my garden--I let it flop over onto a low stone wall and it makes a well-behaved cloud, with lavender on one side and lady's mantle on the other.
On Jul 12, 2004, jhyshark from Scottville, MI (Zone 4b) wrote:
Yes, it's very invasive, but makes a nice backdrop for other plants. The foliage is the feature, the flowers are insignificant. Mine gets about 4' tall even in very poor soil. See pix of babies as well as plant in mid-July
Regional...
This plant has been said to grow in the following regions:
Hereford, Arizona Santa Rosa, California Ventura, California Bradenton, Florida Pompano Beach, Florida Zolfo Springs, Florida Clarkesville, Georgia Valdosta, Georgia Scottville, Michigan Blue Springs, Missouri West Kill, New York Belfield, North Dakota Gold Hill, Oregon Denver, Pennsylvania Monessen, Pennsylvania Houston, Texas Richmond, Texas Seattle, Washington
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