WSU Extension

Hortsense

Weeds
 
Annual bluegrass 
Barnyardgrass 
Bentgrass, creeping 
Bermudagrass 
Bittercress (Shotweed, Hairy bittercress) 
Bittersweet nightshade (European bittersweet) 
Black medic 
Blackberry (Himalayan, Evergreen, Pacific) 
Blue mustard (Purple mustard, Tenella mustard) 
Brackenfern, western 
Buffalobur 
Bull thistle 
Buttercup, creeping 
Canada thistle 
Catchweed bedstraw (Cleavers) 
Catsear, common (False dandelion) 
Chickweed, common and mouseear 
Clover 
Comfrey 
Crabgrass 
Dandelion 
Dock (Curly, Broadleaf) 
Dodder 
Downy brome (Cheatgrass, Downy chess) 
Dwarf mistletoes 
English daisy (Lawn daisy) 
English ivy 
Field bindweed (Wild morningglory) 
Field pennycress (Fanweed) 
Flixweed 
Foxtail (Green, Yellow, Bristly) 
Garden loosestrife 
Giant hogweed 
Goldenrods 
Groundsel, common 
Hawkweeds 
Hedge bindweed 
Henbit 
Herb Robert (Robert geranium, stinky Bob) 
Horsetails (Scouringrush) 
Horseweed (Marestail) 
Knapweeds 
Knotweeds (Bohemian, Giant, Japanese, Himalayan) 
Kochia 
Lambsquarters, common 
Liverworts 
Mallow, common (Cheeseweed, Buttonweed) 
Nightshades 
Oxalis (Creeping woodsorrel) 
Parrotfeather and Eurasian watermilfoil 
Pineappleweed 
Plantain (Broadleaf, Buckhorn) 
Poison hemlock 
Poison ivy and Poison oak 
Prickly lettuce (China lettuce) 
Prostrate knotweed 
Puncturevine (Tackweed, Goathead) 
Purple deadnettle (Red deadnettle) 
Purple loosestrife (Purple lythrum) 
Purslane, common 
Quackgrass 
Red sorrel (Sheep sorrel) 
Redroot pigweed (Rough pigweed) 
Redstem filaree (Stork's bill, Crane's bill) 
Reed canarygrass 
Russian thistle (Tumbleweed) 
Ryegrass, annual (Italian ryegrass) 
Salsify (Goatsbeard) 
Scotch broom 
Shepherd's-purse 
Smartweeds 
Sowthistle, annual and perennial 
Speedwells 
Spurges (Prostrate spurges) 
St. Johnswort, common (Goatweed, Klamathweed) 
Stinging nettle 
Tansy ragwort 
Tumblemustard (Jim Hill mustard) 
Velvetgrass (Common velvetgrass) 
Velvetleaf 
Water primrose 
Waterhemlock, western 
Yellow nutsedge 



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Caption: Clover flowers
Photo by: R. Parker
  
Weeds : Clover : Trifolium spp.
(revision date: 10/14/2016)

Family: Fabaceae (Leguminosae)
Cycle: Various
Plant Type: Broadleaf

Use Integrated Pest Management (IPM) for successful weed management.

Biology
Clovers, depending on species, may be annuals or perennials. Typically, clovers are fairly low-growing, herbaceous plants. The leaves are divided into three leaflets which are attached to the petiole at or near the same point. Blossoms usually occur in ball-like clusters (sometimes in clusters of just a few flowers) and may be pink, red, white, or yellow, depending on the clover species. In lawns, clovers can form dense patches, crowding out turfgrasses. They do not withstand traffic well. Clovers can also be desirable plants in lawns due to their nitrogen-fixing ability. Increases in clover may indicate soils are low in nitrogen. Bees are attracted to the blossom.
Habitat
Clovers commonly grow in fields, meadows, and other sites on well-drained soils. They may be included in seed mixes for lawns, but are sometimes considered to be lawn weeds.

Management Options

Non-Chemical Management
  • Fertilizing the grass will help it outcompete clover, which produces its own nitrogen.
Select non-chemical management options as your first choice!

Chemical Management

Apply according to label directions. Glyphosate products should be applied as spot treatments only! Control of perennial clover species is more difficult than annual species. It may take several applications of some products to control clover. NOTE: Some ingredients listed here are only available in combination. Read the label carefully on combination products to make sure the product is suitable for your specific situation.

Landscape areas
  • glyphosate
  • glufosinate
Turf areas
  • products containing MCPP
  • triclopyr
  • 2,4-D + MCPP + dicamba
Bare ground areas
  • glyphosate
  • triclopyr
Images

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Caption: Clover flowers
Photo by: R. Parker
Caption: White clover
Photo by: R. Parker
Caption: White clover leaves and flowers
Photo by: T. W. Miller
Caption: Red clover
Photo by: T.W. Miller
Caption: Red clover flowerhead
Photo by: T.W. Miller
Caption: Rabbitfoot clover seedhead
Photo by: T.W. Miller
Caption: Rabbitfoot clover flowers
Photo by: R. Parker