are peaches on the tree safe in a 28 degree night?
Peaches are small and not fully ripened.
Certified GKH Gardening Expert
No, they should be ripe by now. They will probably drop soon.
These articles will help you to know when to harvest peaches: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-harvesting.htm
This will help you to get peaches to form properly: https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-care.htm
This will help with fertilization: https://www.gardeningknowhow.com/edible/fruits/peach/fertilizing-peach-trees.htm