How can the tea be fermented into fertilizer?

First, put the remaining tea leaves in a sealed jar and pour ferrous sulfate.

Second, or adding vinegar and orange peel can correct the alkalinity of tea leaves, change the ph value, then mix them with clear water, fully ferment and decompose them and pour them into the pot soil.

Extended data:

Tea refers to the leaves and buds of tea trees. Alias tea, dragon (Ji m:), Ming tea and dragon (Chu m: n). Generally, it refers to the leaves of the evergreen shrub tea tree that can be used to make tea, and the drinks brewed with these leaves, and later it is extended to all herbal teas brewed with flowers, leaves, seeds and roots of plants, such as "chrysanthemum tea"; "Herbal tea" brewed with various medicinal materials is also called Leiya in China literature.

Some countries also use tea made from leaves of other plants, such as fruits and herbs, such as "fruit tea".

Tea-Baidu Encyclopedia