When, Why, and How to Apply Pre-Emergent Herbicide Gallery When, Why, and How to Apply Pre-Emergent Herbicide Blog, Gardening Tips When, Why, and How to Apply Pre-Emergent Herbicide Don’t break your back pulling lawn weeds! Pre-emergent herbicides are the solution for saving yourself a season’s worth of hassles—here’s how. When, Why, and How to Apply Pre-Emergent Herbicide plantsfo 2021-02-01T18:43:31+00:00