My EMPIRE Zoysia lawn here in GA is still dormant,
As we enter March and the beginning of the spring is there any recommended treatment/fertilizer/weed control I need to do
A pre-emergent, probably mid-march depending on what part of GA you are in. I would recommend Dimension or Barricade which you won't find in the big box stores. If your limited to the big box stores, look for Scott's Halts
As far as the fertilizer, it depends on whether you want to go organic or synthetic. If you elect synthetic you want to wait until the lawn starts greening. Organic doesn't matter as long as the grounds not frozen and could be washed away by rain.
Is this the correct product?
Here is a link that might be useful: Barricade grass on amazon
Yes, that would work, but I would be suprised that you can't find it locally depending where you are in GA. If you have a Pikes Nursery close, they carry it.
Again, depending where you are in GA, you want to get ready to spread it. South GA, probably now, mid-GA in the next week or so, north GA, probably in the next week or 2.