The recommended time between fertilizer applications depends on the type of fertilizer used:
- Slow-release fertilizers typically provide nutrients for about 12 to 16 weeks, so you should wait that long before reapplying. Most slow-release fertilizers last around 14-16 weeks, and organic slow-release types can feed for 16-20 weeks
- Quick-release (fast-release) fertilizers act faster but their effect lasts about 4 to 6 weeks. You should wait 4 to 6 weeks between applications of these types to avoid over-fertilizing and potential lawn burn
- General lawn care guidelines suggest applying fertilizer 2 to 4 times per year, spaced roughly 4 to 8 weeks apart depending on fertilizer type and season
- For example, Scotts recommends waiting 6 to 8 weeks between applications, especially when using products with weed or crabgrass preventers
In summary, the interval between fertilizer applications should be:
- About 14-16 weeks for slow-release fertilizers
- About 4-6 weeks for quick-release fertilizers
- Follow product-specific instructions and adjust based on weather and lawn condition to avoid over-application
This spacing allows the fertilizer to take full effect and prevents damage to the lawn.
