Question
What is minimum distance live oak trees may be planted from each other?

Answer
It depends on what you want the planting to look like when mature. If you want open grown trees that are not touching each other I would plant them 40 feet apart. If you want the trees to over lap in the crown try about 20 -30 feet apart. Live oaks have a spread width of 60 to 120 feet at maturity. They need a large space to grow.