Using expired milk with this added makes for great flower growing, but you have to know how to use it properly

Milk is a nutritious food that people drink often, but its shelf life is very short, which often leads to some unfinished milk passing its expiration date, and throwing it away is truly a waste. At this point, some flower lovers think of using it to grow flowers, but many flower lovers, because they do not understand the method, often end up burning roots, burning seedlings, breeding bugs, causing odors and so on. Today I will share with you a way to simply treat milk and then add an item that can be found everywhere, and use it to water and grow flowers; the effect is really quite good.
Milk is rich in protein, vitamins, minerals, vitamin, trace elements, calcium, zinc, potassium and other nutrients. Although it is very good for growing flowers, it must be simply treated before use, otherwise it easily causes root burn and seedling burn. The correct way is to put the milk into a bottle and place it in the sun to expose it so it ferments quickly, but during fermentation do not twist the bottle cap too tightly, so that the gas produced during fermentation can escape.
After the milk has completely fermented and decomposed, crush vitamin B12, first dissolve it in water, then add one tablet of vitamin B12 to every 500 grams of milk, and after letting it sit for one day it is ready to use. Many flower lovers like to dilute fermented milk with water and pour it directly on flowers, but this gives off an unpleasant smell and is also unhygienic. If growing plants outdoors it is still acceptable, but if growing them indoors, it is better not to pour it directly into the flowerpot. When using it, dig a small trench in the flowerpot a little farther from the roots, pour the fermented milk with vitamin B12 added, diluted with 5 times the amount of water, into the trench, and after it has completely seeped into the soil, fill the trench level with soil.
Using vitamin B12 for growing flowers can promote rooting, promote flower growth, make leaf color deep green, and can regulate the acidity and alkalinity of the soil. Milk contains various nutrients needed for plant growth, and also has the effect of killing insects and sterilizing. Mixing these two items together for growing flowers can promote luxuriant branches and leaves, well-developed roots, and brightly colored flowers. It can be said to be an all-purpose fertilizer in flower growing.