March 12 is China's tree planting day. The greatest benefit of ferrous sulfate heptahydrate to plants is to supplement iron to plants. Ferrous sulfate heptahydrate is one of the essential trace elements for plant growth, and it is also an essential element for the formation of chlorophyll. It plays an important role in plant metabolism, biological nitrogen fixation, photosynthesis and carbohydrate formation,When the plant is short of iron, the chlorophyll is destroyed and the leaves lose their green. It is prone to yellow leaf disease, white leaf disease, wheat smut, apple pear scab, fruit tree rot, trunk moss and lichen, plant dwarf, growth stagnation, scorch and fall off,Ferrous sulfate heptahydrate can provide iron nutrition for plants, which is conducive to enhancing the disease resistance and increasing yield and income of plants. In addition, ferrous sulfate heptahydrate can also regulate soil pH, which is conducive to plant growth in alkaline soil. But ferrous sulfate heptahydrate is not suitable for all kinds of plants, ferrous sulfate heptahydrate is mainly suitable for all kinds of acid loving flowers and trees, such as: Iron tree, Rhododendron, camellia, Milan, Chlorophytum, asparagus, brandy, poinsettia, conifer, jasmine, ferns, palms and all kinds of potted flowers and trees bonsai.