Is core aeration of Bermuda grass necessary for a thick, healthy lawn in Georgia?
Aeration every couple years or so it helpful for any kind of lawn, but because you are in Georgia and the soil tends to be clay there and gets compacted easily, more frequent aeration is recommended. Yearly, and even twice yearly core aeration is often recommended for your area. It will help the roots to grow better, which in turn does make for a nicer looking lawn.
How do I kill bermuda grass growing in zoysia grass?
This could be quite difficult.
Your best hope is for the Zoysia to grass out the Bermuda grass.
Is there a product to spray over landscape plants that kills bermuda grass? Some years ago, I thought I had a product "Post" but cannot find it.
I would recommend pouring boiling water on the areas where the bermuda grass is growing. Boiling water will kill whatever it comes in contact with. This article will also help: https://www.gardeningknowhow.com/plant-problems/weeds/how-to-kill-grass-naturally-kill-unwanted-grass-in-your-yard.htm
Alternatively, you could cover your garden plants with cardboard boxes or use a gallon milk jug with the bottom cut off as a shield. Spray the grass with an herbicide when the grass is actively growing. One application won't work, as it's going to take several.
At what height should Bermuda grass be cut for the end of mowing season?
Your final mowing height generally depends on the health of your lawn. If it is healthy, do not change the mowing height. If it's not so great, then raising the mower about 1/2" is usually recommended. You can return to normal mowing height with your first cutting in spring.
I have a backyard that seems to be very difficult for growing grass. I live in Northern VA and part of the yard is clay-like, and we have a dog that digs up the grass when she sprints around. In one part of the front yard, I have a patch of Bermuda grass. I do not like this grass in the front because it's inconsistent and very hard to get rid of! However, due to its deep roots, this grass might be ideal for the back, since the dog won't be able to dig up the roots when she runs. Where can I get Bermuda grass? Does it come in seeds or sod? Any other type of grass that might be better?
Choosing a grass that will grow in your weather zone is very important.
I would suggest contacting your County Extension Office.
They are a valuable source of information for you and will able to make recommendations for you.
I've listed several links for you including how to find the closest Extension Office to you.
https://www.gardeningknowhow.com/extension-search/
http://www.sites.ext.vt.edu/newsletter-archive/cses/2008-03/WhatGrass.html
https://www.gardeningknowhow.com/lawn-care/lgen/what-is-warm-grass.htm
What are the best grass seeds for Alpaca pastures and the best time to start seeding? What is the best method to seed, for instance I already have pasture, but need to cover the bare spots. I have been using a combination of Brome, two type of Fescue, and Orchard Grass. I have been told to first use Gypsum, spread seed, then use top soil to keep the birds and rabbits away from eating seed.
You almost have everything that they would eat, except Bermuda grass. That would be fast spreading if you are in a warmer climate.
Usually, the best time to seed is in early spring, but in the case of Bermuda, it would be better to start late spring, or early summer.
Here is an article that you will find useful: https://www.gardeningknowhow.com/lawn-care/lgen/lawn-seeding-tips.htm
I had my bare yard hydroseeded about 3 weeks ago and there are many spots that have yet to. E filled. Should I add more seeds to the bare spots or will the grass just spread over these spots. Also I have one corner of the yard that doesn’t get much sunlight because of our patio that blocks the sun. There isn’t much growing there either , should I place more Bermuda seed that is for minimal sun light?
It can be hard to grow grasses under these, as they make the soil unsuitable for things to grow around them. This article may help some, but there is not really a good way to grow things under pines, or where their needles are: https://www.gardeningknowhow.com/ornamental/trees/tgen/tips-for-growing-grass-under-a-tree.htm