University of Maryland Extension

Buttercup (Bulbous)

Buttercup

(More lawn weeds)  (Control Options)  (General Weed Gallery)

Photo gallery:

close up of yellow buttercup  flower
Close-up of flower

corms and root system
Corms (bulbous root system)

Life cycle: Perennial, blooms in spring-early summer
Growth habit: forms a basal rosette of 3-lobed leaves, arising from a corm. Flowers are bright yellow with 5-7 shiny petals arising from erect, somewhat hairy stems. Tall and creeping buttercup are also seen but less common
Reproduction: by seed but corms can overwinter
Conditions that favor growth: unfertilized, poor soil

Cultural control: Maintain healthy, dense turf that can compete and prevent weed establishment.
Mechanical control: Hand pulling or using an appropriate weeding tool are the primary means of mechanical weed control in lawns. This is a viable option at the beginning of an infestation and on young weeds. Hand pulling when the soil is moist makes the task easier. Weeds with tap roots like dandelions or have a basal rosette (leaves clustered close to the ground) like plantain and bulbous buttercup (make sure you dig up the corm) are easier to pull than weeds such as Bermudagrass (wiregrass) or creeping Charlie (ground ivy) that spread with stolons or creeping stems that root along the ground.
General chemical control: (lawns) Spot treat weeds with a liquid, selective, postemergent, broadleaf weed killer applied when weeds are actively growing. Look for a product with one or more of the following active ingredients:
2, 4-DMCPP (mecoprop),  Dicamba (be careful when using around tree and shrub roots) or Triclopyr. 

Organic control: 

For a glossary of herbicide terms and additional information see: control options     

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