![]() This list includes wild carrot, wild parsnip, teasel, and common burdock. When using pre-emergents, besides reading and following the directions, it is important to not break the garden’s surface by pulling other weeds and to not plant anything else in the area that has been treated with the pre-emergent.Īs opposed to annual weeds, biennial weeds grow roots and basal rosette leaves the first year, then flower and set seeds in the second year. Crabgrass control, a commonly used pre-emergent, is applied in the spring because crabgrass germination is related to soil temperature. ![]() Pre-emergent herbicides interrupt seed germination by keeping seedlings from emerging and growing. ![]() Another effective technique is the use of a pre-emergent herbicide like Preen®. One way to control the spread of these annual weeds is by hand-pulling and cultivation. Some annual weeds include crabgrass, common chickweed, lamb’s quarters, common ragweed, prostrate knotweed, purslane, henbit, and prickly lettuce. Annual weeds have a life cycle of a year or less. Plants are sometimes dubbed “garden volunteers” instead of “weeds” if they happen to be a welcomed surprise.Ĭonsider weeds as you would any other plant. ![]() Sometimes seeds from wanted plants will spread and the seedlings will appear elsewhere in the garden and become weeds. A weed is simply any plant that is growing and unwanted for example, grass in the lawn is lovely but grass in the garden bed is a weed. Crabgrass in the lawn (l) and Burdock, a biennial weed (r)
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