What is the best time to fertilize and should I put some lime over the zoysia lawn with a broadcast spreader? I live near Raleigh, NC.
Also, when is it necessary to dethatch? I've read about the liquid de-thatcher. What do you recommend?
This article will help with fertilizing zoysia:
https://extension.missouri.edu/publications/DisplayPub.aspx?P=G6706#Maintaining
As for dealing with thatch, regular mowing helps to prevent thatch from accumulating throughout the lawn. It also helps to limit the amount of fertilizer used on zoysia grass. This article may help as well: https://www.gardeningknowhow.com/lawn-care/lgen/lawn-thatch-control.htm
What do I use to kill trash grass in my Zoysia and what type of pre-emergent should I use in the fall and winter to prevent trash grass from starting in the spring? Is there something that will kill St. Augustine without killing the Zoysia? I live in southern Texas near Houston.
If the areas are not too large, you can try spot treating them with either boiling water or Round-up.
If zoysia plugs are set approxiamtely 6-8 inches apart, how quickly can I expect to have my lawn completed and the bare spots filled in? What about planting plugs amongst an established lawn of grass or weeds? Also, I live in St. Louis, MO and was told I have until mid-Sept to plant either sod or plugs, although from what I read on you site, you advise to start no later that mid summer. Any addtional info regarding this time frame would be appreciated.
This article should help: https://www.gardeningknowhow.com/lawn-care/specific/zoysia/planting-zoysia-plugs.htm
Neighbors, and even some passing lawn treaters/experts, have told me it is fescue, bermuda, zoysia, etc. I'd like to see a picture of a shoot/blade, as it crawls into the flower beds, shrubs, etc. Any pictures or good descriptions available?
This picture may help: http://caes2.caes.uga.edu/mastergardener/documents/MGEV_Turfgrass_refresher_1.pdf
What can I use on my grass this time of year to get it ready for next season and reduce the amount of Poe Ana?
This article will help with fertilizing zoysia:
https://extension.missouri.edu/publications/DisplayPub.aspx?P=G6706#Maintaining
This article will help with poa annua control: https://www.gardeningknowhow.com/plant-problems/weeds/poa-annua-control.htm
Where can I buy zoysia grass in California?
Most of your lawn and garden centers will carry this. Just ask around or look up local retailers in your area.
My zoysia lawn, which I've maintained weed-free, is showing several spots of small soil clumps. What is causing this and how do I stop it?
This could be anything from an issue with grubworms (if these clumps are dry in nature) or you could have worm mounds (if moist in nature), which are a result of earthworms--actually a good thing.
Here is more information: https://www.gardeningknowhow.com/lawn-care/lgen/worm-casting-mounds.htm
https://www.gardeningknowhow.com/plant-problems/pests/lawn-grubs-how-to-get-rid-of-grub-worms.htm