Can I successfully sow grass seed after the application of a preemergence herbicide?

Question:

Can I successfully sow grass seed after the application of a preemergence herbicide?

Answer:

Preemergence herbicides, such as benefin, bensulide, and pendimethalin, prevent the germination of crabgrass seeds in spring.  Most preemergence herbicides also prevent the germination of turfgrass seeds.  If you intend to sow grass seed in spring, the only preemergence herbicide that can be used is siduron (Tupersan).  Siduron effectively controls crabgrass without affecting the germination of turfgrass seeds.