Siduron is primarily used as a selective pre-emergent herbicide in turfgrass management. It effectively controls annual grassy weeds such as crabgrass and goosegrass in residential lawns, golf courses, and sod farms. It is especially valued for its ability to prevent weed germination without harming established turf when applied correctly. Due to its selectivity, siduron is often used during the establishment of desirable grasses, as it allows new seedlings to emerge while suppressing competing weeds. It is commonly found in starter fertilizers and turf renovation products where early weed control is critical for successful grass establishment.