The heads of the sunflowers consist of yellow, pleated petals and a maroon center that can appear to be blacks. The heads are daisy-like and consist of 20 to 40 yellow florets. As the seeds ripen, the center begins to appear more black than maroon. Although you’re probably familiar with the single flower, a single sunflower plant can produce multiple flowers that branch out from a single stalk.
A pre-emergent herbicide will suppress the germination of these weeds in your lawns and gardens. If mouse-ear chickweed has already appeared in your flower beds or gardens, a systemic herbicide like glyphosate will effectively kill the weed plants.
Spear thistle is a biennial weed that can grow taller than 3′ in its second year of life. The dark green leaves have spines that cover the edges and the surfaced. The leaves of these biennial weeds are lighter on the bottom because of the dense growth of fine hairs. They are deeply lobed with a long spine at the top of each lobe. In its first year of growth, the spear thistle grows outwardly along the ground and shoots up vertically in its second year.
Weed Control Methods
If your infestation has grown to more than just a few of these weeds, a selective post-emergent herbicide should work well. One application of an herbicide should be enough to wipe out these weeds, but cover all your bases and give the area another dose of the selective product after a month.
Natural control methods include mulching over the area and mowing your grass at a higher level. There are both natural and chemical applications for clover growth.
Japanese knotweed has small white flowers that bloom from late summer to early fall. The flowers appear in spikes or loose clusters called panicles.
That’s what this article is all about. We’re going to look at common weeds with white, yellow, pink, purple, and blue flowers. You’ll not only have a visual representation of each weed to guide you, but included in each weed identification will be the physical description of each of these pesky invaders. You’ll also learn about the problems they can cause in your lawn along with how you can control and eliminate them from your yard.
To help your lawn grass stay at its competitive peak, follow these “good practices” as well:
2. Roncoroni, J., “Dandelion,” University of California Statewide Integrated Pest Management Program, January 2018.
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1. UMass Extension Turf Program, “Biology and Management of Crabgrass,” University of Massachusetts Amherst, May 2011.
For best results, treat new weeds as they emerge from soil, when they’re young, actively growing and still less than 3 inches tall. This stops these lawn pests before they can establish, set seed and spread on their own. Used as directed, IMAGE All-In-One Weed Killer is guaranteed not to harm your lawn.*