Do plants receive nutrients immediately after application?

No, which is the point of a slow-release plant food. Instead, Osmocote nutrients are released into the soil as replacements for the nutrients being drawn into the plant's root system.

The temperature of the soil controls the rate at which nutrients are taken up by the plant and the rate at which nutrients are released by the Osmocote granules. The warmer the soil, the faster nutrients are released. Conversely, when soil temperatures drop, so does the release of nutrients.

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