Perennial is defined as something that lasts for three or more seasons, as is the case for perennial flowers, which live for three years or more. Quick- and slow-release fertilizers can be used on perennial flowers, and they do not need much of it to thrive.
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Chemicals
- Fertilizers have labels that can be confusing for those who are not gardening savvy. Three numbers appear on the labels,each of which represents the amount of a specific chemical found in the fertilizer. The first number represents nitrogen, the second number phosphorus and the last number potassium. The nitrogen content of the fertilizer dictates if it is a slow- or quick-release type.
Slow Release
- Fertilizers marked as slow release allow the gardener to use lesser amounts over time and adjust the amounts as needed. This helps to prevent foliage burning or over fertilizing of perennials and other types of plants, as it releases nitrogen slowly over a longer period of time. The nitrogen is water soluble in such products, and is a more controlled release to the perennials.
Quick Release
- Quick-release fertilizers give a faster growth response than slow-release fertilizers because the nitrogen is released into the soil very quickly. Gardeners may choose not to use such products because of the risk of burning the foliage or because of overgrowth with no flowering. Quick-release fertilizers must be reapplied more frequently than slow-release because of the nitrogen being used up over a shorter period of time versus slow release.
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