You can water flowers, but milk can't be used to water flowers directly, because the rich substances in milk will release lactic acid, which will change the properties of soil and increase the acidity of soil. When fermenting, it will produce some peculiar smell and release heat. Too much water will not be absorbed by the pot soil, which will easily burn the roots and attract pests and a large number of harmful bacteria.

Use expired milk as fertilizer and ferment first. Generally speaking, if conditions permit, the boiled milk can be opened into a clean container, placed at 30-35 degrees, and fermented successfully within 2-3 days. Adding a few drops of yogurt during fermentation helps to accelerate fermentation. At this stage, the temperature is low, and vegetable farmers can appropriately extend the fermentation time.

Open the expired milk and put it in a clean container. You can naturally ferment it in the shed for about a week, and the fermented milk smells sour. Then use water, and its ratio to water is 1:20. If milk has obvious sour taste, it can be used to water flowers. If the expired milk has obvious sour taste, it can be used to water the flowers at this time. You can dig a small pit in the middle of the flower soil and bury the milk in it, so that there will be no unpleasant smell.

It should be noted that milk should not be too much, and it can be used for the second time in about a month. Generally, large flowers cultivated outdoors can be used without any influence, and small potted flowers cultivated indoors are best not to be used, especially those cultivated in water, because the cultivated flowers require high water for cultivation and need clean water, and expired milk cannot be used.