Long-lasting compound fertilizer has a lasting effect; scientific application benefits flower growth

Long-lasting compound fertilizer refers to fertilizer that contains multiple nutrients such as nitrogen, phosphorus and potassium and has been treated by processes such as coating or adding inhibitors, so that the nutrients are released slowly and continuously. Compared with ordinary quick-acting fertilizer, its effect can last for a longer time and it can reduce the number of topdressings, saving labor and effort, making it especially suitable for potted flowers and routine care and management.

In terms of classification, common long-lasting compound fertilizers mainly include coated types, inhibitor types and matrix carrier types. The coated type controls the speed at which nutrients seep out through an outer film material, while the inhibitor type extends the fertilizer effect by delaying nutrient transformation. The release speed of different types is affected by temperature and humidity; when the weather is hot and moisture is plentiful, release speeds up noticeably.

When applying, it can generally be mixed into the soil as a base fertilizer, or shallowly buried at the edge of the pot as a topdressing. When used on orchids and other flowers with fleshy roots, the amount should be small rather than large, and the fertilizer should be kept at a certain distance from the roots to avoid direct contact with them. After watering, the nutrients are released slowly along with the water for the plant to absorb and use over the long term.

It should be noted that although long-lasting compound fertilizer has a mild effect, it is not true that the more used the better; excessive amounts can likewise cause fertilizer damage. During stages when the plant grows vigorously and needs a large amount of fertilizer, quick-acting fertilizer can be used as a supplement, combining slow and fast action. When storing, keep it in a cool, dry place and seal it against moisture, so as to prevent the coating from breaking or nutrients from being lost in advance.