Be sure to have an accurate soil test done to determine exactly what your pH level is and how much you need to lower it. Many vegetables do just fine with soil as sweet as 7.5. If you live where limestone in the soil is constantly dissolving and raising pH, try applying elemental sulfur. It works best when the soil is warm but still is a slow fix, taking months to have any effect. It is a process that should not be rushed. Apply it 2-3 times over the season 6-8 weeks apart, testing between applications to be sure you don't go overboard. To acidify a small area, try watering with leftover coffee diluted 50% with water. Acidic mulches like shredded pine bark, pine needles, or peat moss can slowly lower pH over time. Let your soil test be your guide.
Be sure to have an accurate soil test done to determine exactly what your pH level is and how much you need to lower it. Many vegetables do just fine with soil as sweet as 7.5. If you live where limestone in the soil is constantly dissolving and raising pH, try applying elemental sulfur. It works best when the soil is warm but still is a slow fix, taking months to have any effect. It is a process that should not be rushed. Apply it 2-3 times over the season 6-8 weeks apart, testing between applications to be sure you don't go overboard. To acidify a small area, try watering with leftover coffee diluted 50% with water. Acidic mulches like shredded pine bark, pine needles, or peat moss can slowly lower pH over time. Let your soil test be your guide.