They won't germinate until the temps are consistently above 70 degrees, so I'd wait until then.

I've found that you can cold/moist stratify them in your fridge for 4 months and just plant them on site after your first frost any problem. I've probably had near 100% in ground germination using this method in just a few days (large drainage ditch)! We had a flash flood the other day -- about three inches of rain from training thunderstorms -- and most, if not all of the little sprouts were completely covered with water, and are still alive and healthy looking!

I'm not sure if the nursery I ordered from (everwilde) scarified them or not, but the coatings still appeared to be on the seeds.

I simply used a weed-eater and then a rake to clear the area and scattered a seed/vermiculite mixture onto the exposed mud and packed them into the ground by stepping repeatedly over the area. They did not wash out.

I also boiled the grass I raked up to kill any seeds and scattered it back down over the area to help the seeds to germinate (I used a large aluminum garbage can filled with water, then put the wood ashes from my fire on my lilacs :) Even the grass is still there after the rain, and the vermiculite appears to be, as well. I think a combination of the growth that was already in the ditch, the grass over-top as a light mulch, and packing the area after sowing may have helped (and perhaps good timing -- mother nature waited until the seeds sprouted so you may want to check your weather forecast).

If this website would allow it, I'd show you the pictures. I uploaded them to my computer, only to get on here and find that there is no practical way to post them :-(