If you seeded in the early fall, it's unlikely that you'd see any more seeds from that seeding germinate in the spring. If I remember correctly, fescue germinates pretty quickly, so it's especially true with fescue.

Dormant seeding involves spreading seed down in winter after it is too cold for the seeds to germinate.

Enigma7,

You sound apologetic for wanting to put down a Synthetic Pre-M. There's no need to be. Not everyone on this forum is organic. My local Agway sells Halts (Scott's). I don't like a lot of Scott's products but I can get this without the fertilizer component. It works well for me. Below is a link to the product. I'm sure you can order it from your local garden center.

http://www.scotts.com/index.cfm/event/ProductGuide.product/documentId/33e2d83866482d0db566879669585160

Also, my local HD sells a Lesco fertilizer with Dimesion Pre-M in it. That should work if you are planning to fertilize at the same time.

I am a bit apologetic because I did want to make the complete conversion from synthetic to organic. I posted this in the general forum as opposed to the organic forum since I was looking for synthetic pre-M products and knew I'd probably get some heat in the organic forum.

Unfortunately there is a lot of debate on the effectiveness of CGM as a pre-M. I've heard it works great, takes several years to effectively work, acts as a fertilizer for the weeds, and everything in between. I have the added problem of needing a pre-M that doesn't fertilize because having zoysia this far north means there is quite a bit of time between weed germination and when the zoysia actually starts to grow. This lag time I believe is what has caused all of my problems over the years (where I would put down a chemical fertilizer too early and the weeds would get a nice boost).

I think the CGM I put down last spring and this past fall compounded the issue because while it may have had some pre-M properties, it also gave a nice dose of fertilizer to the soil; fertilizer that the actual lawn was not able to use until much later. By that time the weeds had gained a foothold and thanked me for the feeding.

Thanks everyone for the comments. I had thought my hunch was true (about not having any seed left), but didn't want to kill off the seeds if it was common knowledge that X% of seed will germinate in the spring after the hard frost even if they didn't come up in the fall seeding.

I think I'll go along with a pre-M application without fertilizer, then wait until shortly before the zoysia comes out of dormancy to go back to my organic approach.

Good luck with the reseeded area. Zoysia is a pretty tough grass, so you might end up with way more than you expected come summer.

As for the fescue, the vast majority of it should have germinated in fall if you were watering it. If you were under watering restrictions, like many of us farther south, and were just letting nature take its course, you may have a significant number of seeds laying dormant waiting for some spring rain. If it looks anything like a lawn though, you probably got most of the seeds up and going in fall.