Should I Lime and Seed at the Same Time?

This is why it's also recommended to apply lime before planting seeds. Being able to thoroughly mix the lime deep into the surface of the soil, before seeds are planted, results in a more effective distribution of lime throughout your lawn's entire surface.

Is it OK to lime and seed at the same time?

While it is probably not a good idea to spread lime and seed at the same time from the same spreader since they will likely be applied at different rates, you can apply them one after the other to get your reseeding done in a single day.

Does lime kill new grass seed?

Lime doesn't just raise the pH of soil. It also supplies important nutrients like calcium and magnesium, reduces the soil's toxicity, and makes soil nutrients more available to the grass. All of these benefits make lime a great nutrient source for germinating grass seed.