Should I mow before or after feeding my lawn?

Timing is important when it comes to mowing and fertilizing, as you'll get the most out of nutrients when the timing is just right. Mow the lawn 1-2 days before fertilizing - this will remove the excess growth so when the granules are distributed onto the lawn they can reach soil level. Leaving clippings will contribute to organic matter, but avoid creating an excessive layer of clippings to not smother the grass. Mowing with dull blades will tear grass and allow for pathways into the plant for infection -- I've seen complete lawns fail because of improper mowing before fertilizing.

Local determinants modify definitive practices. In Florida, summer rains require mowing to occur three days before fertilization to avoid washout. What about Arizona's arid climate? The same-day mowing technique applies here too, but you'll have to irrigate immediately. This same method helped a client in Phoenix with a Bermuda lawn, and when we tested the soil, it had 92% effective nutrient utilization compared to 68% effective nutrient utilization when mowed the day after.

There are significant costs associated with mistakes that occur during mowing after fertilization has happened. For example, a homeowner in Maryland mowed too soon after applying a 10-10-10 fertilizer application and distributed the granules into the nearby tributaries of the Chesapeake Bay and faced a $2,800 fine along with being required to install a buffer. Always allow granules to dissolve completely before mowing and your lawn and your wallet will be happy!

Read the full article: When to Fertilize Lawn: By Region & Grass Type