What is the primary characteristic of slow release fertilizer?

The primary characteristic of slow release fertilizer is that it releases nitrogen over a prolonged period. This means that rather than providing a quick burst of nutrients that are immediately available to plants, slow release fertilizers are designed to deliver nutrients gradually. This sustained release aligns with the nutrient uptake needs of plants over time and minimizes nutrient loss due to leaching, especially in sandy soils or during heavy rainfall.

This gradual release also reduces the risk of nutrient burn, which can occur with rapid release fertilizers. Moreover, by nourishing plants over an extended period, slow release fertilizers can enhance the overall health and growth of the plant while also providing more consistent nutrient availability that coincides with the plant's growth stages.