1、 Water change frequency

In hydroponic culture, it is not necessary to change water too often. Usually, the water can be changed once every week in spring and autumn, and more frequently in summer when the temperature is high. It can be changed once every five days. In winter, it is very low and cold, which can prolong the time of changing water. Generally, it is changed once every ten days to half a month. At ordinary times, when the water becomes less, it should be increased appropriately

2、 Precautions

1. Water quality: when changing water, clean water should be used instead of dirty water. If possible, it is recommended to use rainwater or snow water collected at ordinary times. The tap water connected to the faucet at home can also be used, but it should be placed for 1-2 days first

2. Water level: in the process of hydroponic culture, it should be noted that the water level should not be too high. Under normal circumstances, the water surface should be about 1-2cm away from the bottom of the seed ball. It cannot exceed the bottom of the seed ball. If the water level is too high, it will increase the probability of rotten roots

3. Method: when changing water for it, you can't pour water on the bulb. If there is water on the bulb of hyacinth for a long time, it is easy to rot the ball