Alternative Weed Management - Boulder County, Colorado · Extensive tap root up to 20 feet 13 years...

2-5 years Extensive shallow and fibrous roots 10+ years, can also spread vegetatively Roots up to 6 feet deep, up to 12 feet laterally 80+ years Single tap root Shade it out with other healthy favorable grasses Hand pull in early spring Control small patches before it spreads Crowd it out with native perennials Hand pull seedlings and colonies before they spread Pick any flowers before they seed (early July) Crowd it out with native perennials Hand pull basal rosettes during the first year Hand pull 2nd year plants before flowering or seeding Seed Viability & Roots Chemical Free Management Chemical Free Management Chemical Free Management Seed Viability & Roots Seed Viability & Roots Pests • Plants • People Alternative Weed Management Visit our website for more information and handouts boco.org/pesticides for Boulder County Foothills Cheatgrass/Downy Brome Dalmatian Toadflax Common Mullein Photo Sources: *Dalmatian Toadflax: Jeffco Invasive Species Management *Cheatgrass/Downy Brome: Colorado State University Extension, Adams County *Common Mullein: Colorado State University Extension, Boulder County PERENNIAL ANNUAL BIENNIAL

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Transcript of Alternative Weed Management - Boulder County, Colorado · Extensive tap root up to 20 feet 13 years...

Page 1: Alternative Weed Management - Boulder County, Colorado · Extensive tap root up to 20 feet 13 years Single tap root 6 inches long 1-2 years Tap root up to 10 feet long with ˜brous

2-5 yearsExtensive shallow and �brous roots

10+ years, can also spread vegetativelyRoots up to 6 feet deep, up to 12 feet laterally

80+ yearsSingle tap root

Shade it out with other healthy favorable grassesHand pull in early spring

Control small patches before it spreads

Crowd it out with native perennialsHand pull seedlings and colonies

before they spreadPick any �owers before they seed (early July)

Crowd it out with native perennialsHand pull basal rosettes during the �rst year

Hand pull 2nd year plants before�owering or seeding

Seed Viability & Roots

Chemical Free ManagementChemical Free ManagementChemical Free Management

Seed Viability & Roots Seed Viability & Roots

Pests • Plants • People

Alternative Weed Management

Visit our website for more information and handouts boco.org/pesticides

for Boulder County FoothillsCheatgrass/Downy Brome Dalmatian Toad�ax Common Mullein

Photo Sources:*Dalmatian Toad�ax: Je�co Invasive Species Management *Cheatgrass/Downy Brome: Colorado State University Extension, Adams County*Common Mullein: Colorado State University Extension, Boulder County

PERENNIALANNUAL BIENNIAL

50 years, can also spread vegetativelyExtensive tap root up to 20 feet

13 yearsSingle tap root 6 inches long

1-2 yearsTap root up to 10 feet long with �brous roots

Crowd it out with healthy favorable plantsCut before seeding to deplete root stores

as much as possibleProvide uniform irrigation

Mow repeatedly(cut no more than 1/3 grass height)

Pick the �owers before they seedHand pull

Mow during seedling stage and repeatedly cut no more than 1/3 grass height)

Collect dried tumbleweeds and disposeof them in the trash

Hand pull

Seed Viability & Roots

Chemical Free ManagementChemical Free ManagementChemical Free Management

Seed Viability & Roots Seed Viability & Roots

Pests • Plants • People

for Boulder County FoothillsBindweed Dandelion Kochia (a tumbleweed)

Photos sources:*Bindweed: Colorado State University Extension, Adams County*Dandelion: stock snap photos, not copy righted*Kochia- Colorado State University Extension, Adams County

PERENNIALPERENNIAL PERENNIAL

Pests • Plants • People

Alternative Weed Management

Visit our website for more information and handouts boco.org/pesticides