1. Bury acid humus: When making acid soil, you can bury some acid humus into the soil, such as rotten pine needles, residual branches and leaves, etc., or directly mix it with humus soil, which can be absorbed and fused by the soil to change the pH value of the soil, thus making acid soil.
2. Fermented peel solution: When eating fruit at ordinary times, collect the leftover peel, wash it and put it into a container. Add clean water and ferment it in the sun. Take out the fermented solution, add clean water to dilute it, and irrigate it into the soil. It can not only make acidic soil, but also enhance fertility.
3. Add vinegar: Prepare vinegar, add water to mix and dilute, and then spray it on the soil surface. Do not use too much at one time. Pay attention to check the pH value. It can be made in a few days.
4. Ferrous sulfate solution: Ferrous sulfate is acidic, which can improve the pH value of the soil. Mix ferrous sulfate powder and clean water evenly according to the ratio of 1:1000, and then pour it into the soil. Pour it 2-3 times a month, and you can make acidic soil.
Acidic soil is suitable for planting acid-loving southern flowers, such as gardenia, Sinningia speciosa, azalea, hydrangea, Milan flower, camellia and so on.
