What is hydrangea?

1. Hydrangea belongs to the genus Hydrangea of Saxifragaceae, also known as hydrangea, hydrangea, Ajisai, Viburnum hydrangea and pink flower. Hydrangea is green at first, then white and fragrant. Because it looks like a hydrangea, it is named hydrangea. Hydrangea is a common garden flower. Its umbel is like a snowball, surrounded by oval green leaves, which is really beautiful. Hydrangea shrub, 1-4 meters high; Flowering from June to August. Hydrangea likes warm, humid and semi-cloudy environment. The suitable growth temperature of hydrangea is 18-28℃, and the winter temperature is not lower than 5℃. It takes 6-8 weeks for flower buds to differentiate at 5-7℃, 20℃ can promote flowering, and maintaining 16℃ after flowering can prolong flowering. But the high temperature will make the flowers wither quickly.

2. Loose, fertile and well-drained sandy loam is the best soil for potted plants. Keep wet, but don't water too much, especially in rainy season, pay attention to drainage to prevent roots from rotting due to waterlogging. Indoor potted hydrangeas should be slightly dry in winter. If it is too wet, leaves rot easily. The change of soil pH makes the color of hydrangea change greatly. In order to deepen the blue color, aluminum sulfate can be applied during bud formation. In order to keep pink, lime can be added to the soil.