1.Understanding Soil Preferences: Hydrangeas need well-drained soil to prevent root rot. For blue flowers, aim for acidic soil (pH 5.5-6.5); For pink flowers, opt for alkaline soil (pH 6.5-7.5).
2.Soil preparation: Before planting, enrich the soil with organic matter such as compost or peat. Loosen the soil to a depth of 30-45 cm, removing any obstacles to root growth.
3.Test and adjust pH: Determine the pH of the soil using a test kit. For blue flowers, lower the pH with aluminum sulfate or sulfur; for pink flowers, increase the pH with lime or dolomitic limestone.
4.Maintaining soil health: Monitor soil moisture, watering deeply and evenly, especially during dry periods. Apply an organic mulch to retain moisture and regulate temperature.
5.Fertilize annually: Use a balanced, slow-release fertilizer formulated for flowering shrubs in spring or early summer to promote healthy growth and abundant blooms.

By following these steps, you can ensure that your hydrangeas thrive and produce an abundance of beautiful flowers, enhancing the charm of your garden with their vibrant colors.