Answer: First of all, I suggest you have your soil tested for pH. Your Cooperative Extension Service (ph# 970-498-6000)can provide test kits. Then, once you know the pH, you can choose trees that will thrive in your soils. It is possible to acidify soil by adding acidic materials like pine needles or sulfur, but I think you'd be better off planting trees adapted to your soils.
Q&A Library Searching Tips