For one year now it has done nothing. It is not dead, as it is green inside. I have trimmed off each of the tips this year. What to do? Help.
The fact that your tree has not grown in 1 year is concerning.
I would look to the planting procedure and the soil that your tree is planted in.
It is crucial for the planting hole to be dug large enough for the roots.
Well draining soil is very important.
It may be time for you to dig the tree up and check the roots.
Healthy roots should be white and firm. Dead roots are dark, black and soft.
Depending on the findings you can either replant or replace the tree.
Here are some articles to refresh you on the care requirements.
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-care.htm
https://www.gardeningknowhow.com/ornamental/trees/tgen/watering-newly-planted-tree.htm
Can a peach tree that grew from a fallen peach kernel produce a viable tree that will have peaches?
Yes, it is possible.
Here is an article that will help you.
https://www.gardeningknowhow.com/edible/fruits/peach/planting-peach-seeds.htm
One of my peach trees is completely covered with curl leaf. What should I do now to prevent further damage to the tree?
Here is an article that will help you.
https://www.gardeningknowhow.com/edible/fruits/peach/peach-leaf-curl.htm
I wasn't quick enough to treat my peach trees from the peach curl which they developed a year ago. I sprayed them in the early spring with a copper fungicide, but the curl came back pretty strong. As the leaves were emerging, I stripped off the obviously infected ones and I sprayed with a seaweed concentrate solution. This was about three weeks ago. The tree is loaded with developing peaches but many leaves are infected. Is there anything else I can do now? Strip more leaves? Spray again with seaweed?
There is little that can be done in spring with regards to spraying for Leaf Curl.
Thinning the fruit load can help.
The articles below have more information on control of Leaf Curl and application of treatment methods.
http://www.ipm.ucdavis.edu/PMG/PESTNOTES/pn7426.html
https://www.gardeningknowhow.com/edible/fruits/peach/peach-leaf-curl.htm
https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm
the first crop of peaches on my tree have globs of a clear jelly like substance clinging to the fruit. Some of the first peaches on my 2 year old peach tree had shriveled and dropped before fully developing. I understand the tree can drop this fruit as a 'natural thinner.' Now I am seeing a crystal clear gelatinous substance all over the fruit. What is causing this and how can I treat it?
That is caused by peach borer. This article will help you with that:
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-borer.htm
When peach trees spring up from the root of a tree killed by frost, will it produce good fruit?
The growth is most likely growing from the root stock.
What that particular root stock was and what it may produce are unknowns.
If you have the space and are curious, you certainly can leave it to grow.
I myself lost 2 Pear Trees to cold several years ago, I left the root stock to grow and they bloom each year and help act as pollinators for my other Pear Trees. They have not produced fruit!
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-care.htm
We have 1 peach tree which lives with our 2 apple trees. Every year (we've lived here for 20 yrs) it gets blooms on it and gets tons of peaches but just when they are starting to ripen, every one of them gets rotten places and fall off the tree. I have also noticed that the trunk of the tree always has black and green patches on it. I would love to have peaches at least 1 year. What can I do?
Sounds like your tree might be suffering from brown rot fungus or peach scab.
These articles may help you identify exactly what's going on and then choose the appropriate treatment:
https://www.gardeningknowhow.com/edible/fruits/peach/brown-rot-fungus.htm
https://plantdiseasehandbook.tamu.edu/food-crops/fruit-crops/peach-apricot-and-nectarine/