I live in northern Missouri, Zone 5.
Here are some tips to protect your peach tree during the winter:
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-cold-protection.htm
I don't know what to do for my peach tree. The leaves are yellow and there is fruit on it.
It sounds a lot like there is plenty of phosphorus and potassium in the soil, but little nitrogen. This leads me to believe that the soil pH might be a little too high.
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/soil-ph-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/alkaline-soil-plants.htm
https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/raise-acid-level-soil.htm
https://www.gardeningknowhow.com/edible/fruits/peach/how-to-grow-elberta-peach-trees.htm
So my peach tree accidentally got over fertilized and has these red spots which I tried using a copper spray to get rid of. But now it’s lost all the bottom leaves and only growing from the tops. Is it lost for good?
Not necessarily. To remedy the situation, you should thoroughly water the containers to flush out excess fertilizer. This will help dilute the concentration of nutrients in the soil. It's also important to monitor the trees closely for any signs of stress or leaf discoloration. If necessary, you may need to repot the trees in fresh, well-draining soil to provide them with a healthier growing environment.
These articles will help:
https://www.gardeningknowhow.com/edible/fruits/peach/fertilizing-peach-trees.htm
https://www.gardeningknowhow.com/edible/fruits/peach/growing-peaches-in-containers.htm
I'm trying to keep them short.
This information should help:
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-pruning.htm
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-thinning.htm
just want to know what is wrong with my peach tree. i have little peaches and for some reason some of the limbs have brown leaves on it already.
These articles should help:
https://www.gardeningknowhow.com/edible/fruits/peach/common-peach-diseases.htm
https://www.gardeningknowhow.com/edible/fruits/peach/spraying-peach-trees.htm
https://www.gardeningknowhow.com/edible/fruits/fegen/reasons-for-small-hard-fruit.htm
https://www.gardeningknowhow.com/edible/fruits/peach/peach-shot-hole-fungus.htm
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-pruning.htm
From the start, I haven't pruned my peach tree like I should have. It's about 4yrs old now and overgrown. Is it too late to take control?
It isn't too late. Since you won't be able to keep any first year branches, you will not be able to get much fruit next year. Following that, with regular pruning, you should start to see good crop production.
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-pruning.htm
Prolific--fruit set on in clusters like grapes. Largest ripe ones almost 3" tall. Orchard is in Klickitat County, WA. Sorry. No photos taken.
Without photos, this will be very difficult. In this case, I would suggest taking samples or photos to your local extension service. They may be able to help:
https://www.gardeningknowhow.com/extension-search
Here is a collection of articles on peaches that you may find useful: