You'll hear me talk about my favorite lawn fertilizer for spring. Also we will talk about applying a pre-emergent herbicide if you desire not to have crabgrass this year. and what would be a spring episode concerning your lawn if we didn't talk about the lawn mower. getting a new blade, changing the oil and the spark plug. when I didn't mention in the episode that this is an important time to change the air filter in the lawn mower as well.