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Canada Thistle

 

  • 1-4' tall

  • Forms colonies and spreads vigorously via underground stems

  • Deep-rooted

  • Flowers are purple 1/2" - 1/3" wide – multiple flowers per plant

  • Aggressive and difficult to control

  • Tillage only increases numbers

 


Musk Thistle

 

  • 2-6' tall

  • Large deeply lobed spiny leaves

  • Large 1 ½" - 2 1/2 " wide purple flower

  • Invades pastures/rangeland forming dense stands

  • Very competitive

 

Dalmation Toadflax
 

  • 1-3' tall

  • Perennial, reproduces from roots and seeds

  • Leaves are waxy and wrap around stem, almost triangular or heart-shaped

  • Yellow  “snapdragon”- like flowers with a long spur

  • Aggressive weed with a deep root system

  • Difficult to control

 

Yellow Toadflax
 

  • 1-2' tall

  • Perennial, reproduces from roots and seeds

  • Leaves are numerous and narrow

  • Flowers are yellow, 1" long, look like a “snapdragon”

  • Aggressive invader with a deep root system

  • Difficult to control

 

Diffuse Knapweed
 

  • 1-2' tall

  • Stems rough to touch

  • Numerous narrow leaves

  • Flowers are white to purplish

  • Flowers July-September

  • Reproduces by seed

  • Highly competitive

 

Downy Brome aka Cheatgrass
 

  • Winter annual

  • Light green plant with soft hairs on the leaf

  • Germinates in late summer to fall

  • Mature plants dry out in summer months creating a fire hazzard

  • Seeds can embed in clothes and animal fur

 

Leafy Spurge
 

  • 1-3' tall

  • Reproduces by roots and seeds

  • Leaves are narrow, 1"-4" long

  • Flowers are yellowish green with similar color bract beneath

  • Very deep tap root system with large nutrient reserves

  • Exudes a milky sap that can irritate skin, humans and livestock

  • Seed capsules dry down and explode; can project seeds up to 15’

  • Very difficult to control

 

Common Mullein
 

  • 2-6' tall

  • Large fuzzy leaves

  • Rosette in the first year,  flowers in 2nd year

  • Flowers are yellow on long stalks

  • Stalks can produce thousands of seeds that persist in soil for years

  • Flowers and seeds June-August

​

Canada Thistle
Musk Thistle
Dalmation Toadflax
Yellow Toadflax
Diffuse Knapweed
Cheatgrass
Leafy Spurge
Common Mullein

Bachelor of Science in Landscape Horticulture with emphasis in Turfgrass Management from Colorado State University

LADD FISCHER
25 YEARS GREEN EXPERIENCE
OUR SERVICES

- Weed Spraying

- Noxious Weed Consultation

- Pasture Management Consultation

- Soil Testing

-Overseeding

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FRANKTOWN, CO

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