Expired milk can be used to water flowers, but can not be used directly, to be fermented first. Otherwise, poured directly into the potting soil, will soon produce an unpleasant smell, and the heat emitted is easy to burn the roots, affecting the growth. When fermenting, pour it directly into a container, add a small amount of water, seal it and put it in the sun, and it will be ready for use in about a month. At this time there will be odor, it is recommended to ferment for a longer period of time, the taste will be lighter.

1, overnight tea: overnight tea is harmful to humans, can not continue to drink, but can be used to water flowers. Because it is acidic water, for some plants that like acidic soil, can promote growth. However, before pouring or to observe the degree of soil moisturization, can not blindly watering, otherwise it will also affect growth.

2, rice water: rice water contains many trace elements, can promote plant growth. But it should also be fermented before use, otherwise it will also burn the root system, which is not good for growth.

3, cool white water: you can also use cool white water to pour, than directly connected to the tap water is more easily absorbed. Like water that has been sunburned, it can make the plant grow more vigorously.