We can use an annual grass-looking weed in a lawn for short-term periods. It is quite beneficial too because of its invasive, similar-looking, and low-maintenance nature. Crabgrass is one of those few weed types of grass that looks like st Augustine and can work the same as lawn turf for short periods. But considering it as a weed is more suitable in warm season lawns like Bermuda and St Augustine. Dallisgrass is a perennial weed that looks similar to crabgrass but has different properties. Crabgrass vs Dallisgrass in Lawn in the USA I can understand what things make you trouble distinguishing both weeds. Here, I've covered most of the points to help you with this query. Keep in mind that Crabgrass and Dallisgrass comparison is different from Bermuda and Centipede grass . Crabgrass is an annual grass that loose life just after a couple of seasons per year. Dallisgrass recovers itself every spring and grows with its seeds and rhizomes. It doesn't need any external caus...