The issue: Curlycup Gumweed

The issue: Redroot pigweed

The issue: Summer is when weeds are most noticeable, mostly because they are large and that is the time we are out in our yards and fields. Annuals and seedlings are easy to kill. Biennials are usually going to seed during the summer months. Perennials are quite difficult to kill in the summer.

The issue: Wild buckwheat

The issue: Spotted spurge

The issue: Common mallow or cheese weed (Malva neglecta) is a non-native weed that will germinate from spring through fall. Fall-germinated seedlings will overwinter and continue growth during the next spring. While it is an all-season annual, it may behave more like a biennial or even a sho…

The issue: Black medic

The issue: Prostrate knotweed

The issue: Pineapple weed

The issue: Puncturevine

The issue: Leafy spurge

The issue: Western salsify

The issue: Houndstongue

The issue: Common yarrow

The issue: Field bindweed (morningglory)

The issue: Hoary cress (whitetop)

The issue: Canada thistle

The issue: Bur buttercup

The issue: Crabgrass

The issue: Spring weed control

The issue: Annual bluegrass

The issue: Quackgrass

The issue: Scotch thistle (Onopordum acanthium L.), is a non-native plant from Eurasia. This biennial, which can reach 12 feet, forms a rosette with large leaves and a deep taproot the first season. The leaves and stems are gray-green in color. Scotch thistle has very prominent stem “fins” a…

The issue: White Bryony

The issue: Russian Knapweed

Winter Weed Control: Bittersweet nightshade

The issue: Diffuse Knapweed

Winter Weed Control: Virginia Creeper

Winter Weed Control: Russian olive

Winter Weed Control: Siberian elm

Winter Weed Control: Woody plant control—basal bark treatment

Winter Weed Control: Woody plant control—Cut-stump

Fall Weed Control: Prickly lettuce — all-season annual or biennial

Fall Weed Control: Common chickweed — all-season annual

Fall Weed Control: Musk thistle: It’s not too late to do something.

Fall Weed Control: Myrtle spurge; many pretty plants are a problem

Fall Weed Control: Shepherd’s purse — all-season annual

Winter weed control: Woody plant control

Fall Weed Control: Common mallow; get it while it’s small

Fall weed control: Get a jump on perennial weeds

Fall weed control: Don’t wait for biennials to flower in the spring

The Enemy: Chinese Elm (Ulmus parifola)

The Enemy: Prostrate purslane (Portulaca oleracea)

The Enemy: Houndstongue (Cynoglossum officinale)

The Enemy: Perennial pepperweed (Lepidium latifolium)

The Enemy: Moth mullein (Verbascum blatteria L.)

The Enemy: Austrian filedcress (Rippa austriaca)

The Enemy: Smooth brome (Bromus inermis)

The Enemy: Puncturevine (Tribulus terrestris)

The Enemy: Wild angelica (Angelica sylvestris)

The Enemy: Western salsify (Tragopogon dubius)

The Enemy: London rocket (Sisymbrium irio)

The Enemy: Golden chamomile (Anthemis tinctoria)

The Enemy: Rocky Mountain beeplant (Cleome serrulata) or spider flower

The Enemy: Common groundsel (Senecio vulgaris)