Ralph Waldo Emerson claimed a weed was “A plant whose virtues have not been discovered.” But when they grow in your lawn or garden, they can overpower the plants you are trying to grow. If a weed is strong enough it can cause overcrowding and depletion of the soil nutrients and moisture that would otherwise be available to your grass or garden plants. Thus a weed is a plant you don’t want growing in your lawn or garden, mostly because the plant’s undesirable qualities outweigh their good points. Here are a few:
The dandelion is a common perennial broadleaf member of the daisy family with a thick, deeply penetrating taproot that is found in lawns and other open turfgrass areas. They grow directly from the crown of the plant with no stem, forming a rossette at the soil surface. It is distinguished by its yellow flower, hollow stem that secretes a milky juice when broken and tufted seeds.
Crabgrass is the most commonly found grassy weed in Michigan lawns. Crabgrass grows vigorously in full sunlight and high temperatures and will easily out compete cool-season grass under those conditions. The most notable areas in your turf would be along the driveway, sidewalks and rubber edging. Crabgrass is a summer annual. This plant has a life cycle of less than one year.