In horticulture, the use of chemicals to accelerate plant growth requires caution, because improper use may have a negative impact on plants, soil, and the environment. The following are some commonly used chemicals and methods, but please be sure to follow the safe use guidelines and consider the long-term effects： ### 1. **Nitrogen fertilizer (N)** -**Function**: Nitrogen is a key nutrient needed for plant growth, which promotes leaf growth and photosynthesis. -**Common forms**: urea, ammonium nitrate, ammonium sulfate. -**Method of use**: Dilute and apply according to the packaging instructions to avoid excessive use, so as not to cause “burning seedlings” or environmental pollution. ### 2. **Phosphate fertilizer (P)** -**Effect**: Phosphorus promotes root system development and flower bud formation, which contributes to the overall health of plants. -**Common forms**: superphosphate, potassium dihydrogen phosphate. -**Method of use**: Use in combination with nitrogen fertilizer and apply in moderation. ### 3. **Potash fertilizer (K)** -**Effect**: Potassium enhances plant disease resistance and resistance, and promotes fruit maturation. -**Common forms**: potassium chloride, potassium sulfate. -**Method of use**: Apply in moderation according to plant needs. ### 4. **Compound fertilizer** -**Function**: It contains a variety of nutrients such as nitrogen, phosphorus, and potassium to provide balanced nutrition. -**Common form**: NPK compound fertilizer. -**How to use**: Use according to the instructions to avoid overdose. ### 5. **Plant growth regulator** -**Function**: Promote growth by regulating plant hormone levels. -**Common forms**: Gibberellin (GA3), cytokinin, auxin (such as indoleacetic acid). -**How to use**: Use strictly according to the instructions. Excessive use may cause plant deformities or abnormal growth. ### 6. **Trace element fertilizer** -**Function**: Provide micronutrients (such as iron, zinc, copper, manganese, etc.) needed by plants to promote healthy growth. -**Common forms**: chelated iron, zinc sulfate, etc. -**Method of use**: Apply in moderation according to plant needs. ### 7. **Organic fertilizer** -**Function**: Improve soil structure and provide slow-release nutrients. -**Common forms**: compost, rotted manure, earthworm manure. -**Usage method**: Used as a base fertilizer or top dressing, it is suitable for long-term improvement of soil health. ### Precautions： -**Use in moderation**: Excessive use of chemicals may lead to soil salinization, plant “burning seedlings” or environmental pollution. -**Test the soil**: Before fertilizing, it is recommended to conduct a soil test to understand the nutrient status of the soil and avoid blind fertilization. -**Alternate use**: Combining organic fertilizers and chemical fertilizers can not only quickly supplement nutrients, but also improve soil health. -**Safety protection**: When using chemicals, please wear gloves and masks to avoid direct contact with the skin or inhalation. ### Long-term advice： -**Improve soil**: Improve soil structure and promote healthy plant growth by adding organic matter (such as compost). -**Reasonable watering**: Make sure that the plants get enough water, but avoid stagnant water. -**Light management**: Ensure that plants receive sufficient sunlight or appropriate artificial light. Through the rational use of fertilizers and growth regulators, plant growth can be promoted in the short term, but long-term healthy growth requires comprehensive management.