Because creeping buttercup can tolerate heavy, wet soils, it can be a particularly bad problem on well-watered lawns, wet meadows and poorly drained pastures. Creeping buttercup also depletes potassium in the soil and so can have a detrimental effect on surrounding plants. One plant can spread over a 40 square foot area in a year. Achenes have a short hooked beak and are light brown to blackish brown when mature with an unevenly pitted surfaceĬreeping buttercup's competitive growth crowds out other plants, especially in wet soils. Fruits are clusters of 20-50 achenes on globe-shaped heads.Bloom time is usually from March to August.Flowers usually have five (sometimes ten) glossy, bright yellow petals and grow singly on long grooved stalks.Basal leaves have long petioles (stalks), leaves higher up the plant have shorter or no petioles.Pale patches on the leaves distinguish creeping buttercup from similar looking plants such as hardy geraniums.Leaves are dark green with light patches and are divided into three toothed leaflets, the central leaflet on a stalk.Can grow up to one foot tall but are often shorter in mowed areas.Can be distinguished from other buttercup species such as tall buttercup ( Ranunculus acris) by the creeping stolons.Perennial with short swollen stems and creeping stolons that root at the nodes.The King County Noxious Weed Control Board recommends the prevention of spread of this species to uninfested areas and its control in protected wilderness areas, natural lands that are being restored to native vegetation, and in pastures that are being grazed. For more information see Noxious Weed Lists and Laws. However, in King County, this non-native invasive buttercup species is classified as a Weed of Concern. Legal status in King County, WashingtonĬreeping buttercup is not on the Washington State Noxious Weed List. This plant is extremely aggressive and toxic to grazing animals. Stolon growth starts in spring, peaks in late summer. Reproduces by seed and vegetatively via long, branching stolons that root at the nodes. March-August, produces bright yellow, glossy flowers with usually 5 (up to 10) petals. Leaves and stems are both somewhat hairy. Leaves are dark green with pale patches, divided into 3 toothed leaflets. It is rainfast in only 2 hours and is very safe to grass.Creeping buttercup, a King County Weed of Concern, is a low-growing perennial with creeping stolons that's found in rural and urban areas throughout King County, such as pastures, farmlands, natural wetlands, city gardens, and lawns. It is very good value for money – 16 knapsacks from each litre of product when mixed in 10 litre batches.Stock grazing can resume 7 days after application (but longer if poisonous weeds such as ragwort are present).Fast-acting and moves to the roots ensuring high levels of long-term control.Provides excellent control of broadleaved dock, curled dock, creeping thistle, spear thistle and common nettle and also has an effect on a large range of other weeds.Designed for application via a knapsack sprayer.Apply between 1st February and 30th November.Translocates deep into the roots ensuring a lasting level of control.Has a stock withdrawal period of just 7 days (but could be longer if poisonous weeds such as ragwort are present).Where grass is over grazed or short of nitrogen it struggles to compete with dominant weeds like buttercups, dandelions and daisies.If not then seek training or employ a spray contractor or local farmer to do the job for you. They are professional use products which you can use if you hold a PA2 (for boom sprayer) and/or PA6 (for knapsack) certificate of competence (visit for details of your nearest course). Short grazing interval so animals can return back to paddocks quickly.Įnvy ® and Grazon®Pro meet these requirements.
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