Crabgrass is an aggressive lawn weed that tends to emerge in the springtime.
Crabgrass is an annual weed meaning that it lives and dies within one year.
Yes, crabgrass can spread quickly because it is an annual weed. Annual weeds tend to produce many seeds. For this reason it is important to control the weed early in the lifecycle.
Crabgrass start to sprout when the temperatures get to be in the mid-fifties.
Due to the nature of crabgrass being an annual weed it does grow and die within the same year. Typically the weed dies off and becomes dormant in the fall. When crabgrass die it leave bare spots in your lawn which can be an eyesore.
Crabgrass should be treated with a pre-emergence herbicide in the spring to keep seeds from sprouting.