both?
They hydroseeded initially in late July. Which we've learned is pretttttty much the worst time. Got about 3 inches of rain sometime in the next week. Seed was pretty much gone. So we waited and seeded ourselves on a mid/late-Sept weekend. The next Thursday, we got a single day September record rainfall for the city. Seed gone again. And yes, we had been watching the weather and waited for what looked like a long dry spell.
So we said **** this **** that and seeded the worst parts again like late Oct/early Nov. We had some grass by that point but extremely patchy and very thin. Some patches of very thick grass where seed had pooled. We figured we'd have to seed again in spring.
But when we had the person come out and look in late March, they pointed out that a lot of that last seeding was now germinating and they thought we'd be ok with not having to seed this spring, focus on fertilizing, mowing high, and getting what we had established. Then aerate and overseed where needed in the fall. And some kind of fertilizer, I think.