Straight up 10-10-10 often doesn't have micros. Does the one you're using?
I have really found that regular citrus fertilizer with full micros works well. Yes, they like their fertilizer, but not all at once. They are subject to root burn. I find lighter, more frequent feedings work best.
Here are my peaches, which were just put in the ground to replace the trees Irma killed. They've only been in the ground around 6 months.
2 questions - One, peaches do NOT like wet feet. Is that spot well drained? 2. Which peach tree is it? You say low chill, but how many hours required, and how many do you receive every year?