In order to promote the rapid growth of plants, the following **legal and safe**chemicals and regulators can be used rationally, but the instructions for use must be followed to avoid excessive or improper use.： --- ### **1. Nitrogen, phosphorus and potassium fertilizer (NPK)** -**Function**: Provide essential nutrients for plant growth. -**Nitrogen (N)**: Promotes leaf and stalk growth (such as urea and ammonium nitrate). - **Phosphorus (P)**: Stimulates root system development (such as superphosphate). -**Potassium (K)**: Enhances disease resistance and fruit quality (such as potassium sulfate). -**Recommendation**: Choose water-soluble fertilizers (such as 20-20-20 balanced fertilizers) for faster results. ### **2. Plant growth regulator** -**Gibberellin (GA3)**: Directly stimulates cell elongation, breaks dormancy, and accelerates growth (it needs to be diluted and sprayed according to the concentration). -**Cytokinin**: Promotes lateral bud germination and leaf expansion (such as 6-BA). ### **3. Trace element fertilizer** -Supplement iron, zinc, magnesium, etc. (such as chelated iron) to prevent growth stunting caused by deficiency. ### **4. Humic acid/seaweed fertilizer** - Natural extracts can improve nutrient absorption efficiency and enhance plant metabolism. --- ###**Precautions** 1. **Use strictly according to dosage**: Excessive use will burn plants or pollute the environment. 2. **Combined with environmental optimization**： - Ensure adequate light, suitable temperature and moisture. -Improve soil ventilation (such as adding organic matter). 3. **Avoid relying on chemicals**: Long-term healthy growth depends on ecological balance. --- ###**Safety tips** -Give priority to organic fertilizers or slow-release fertilizers to reduce the risk of chemical residues. -Modulators such as gibberellin need to be used during specific growth periods (such as the seedling stage). Abuse may lead to increased growth or reduced production. For more specific suggestions, please provide the plant species and current growing conditions!