Dig a new garden bed and all those dormant weed seeds shoot up. By the time August rolls around, weeds may be waist high. Weeds have a few things in common. They grow rapidly, flower quickly and produce vast quantities of seeds. One good size lambsquarter can supposedly produce 70,000 seeds.
Weeds compete with our garden plants for light, nutrients and water.
Once you have decided a plant is a weed, here are some weed control options. First identify the weed. Annuals such as crabgrass, foxtail, goosegrass, lambsquarter and buttonweed live one growing season and must come back each year from seed. Biennials such as burdock and poison hemlock live two years producing the seed in the second year. With perennials such as dandelions, creeping charlie, and quackgrass the same plant comes back each year.