Though fall applications are most effective for controlling broadleaf weeds, spring applications are warranted for new customers or areas that did not get treated last fall. Spring applications will be most effective if you wait until dandelions are at or near flowering, but still not as effective as fall applications. Applications before mid-April will only “burn” the leaves and weeds will grow back by summer. In spite of the cooler temperatures, Our GDD Tracker at http://www.gddtracker.net/ is indicating dandelion control is here or just around the corner with ester formulations, dependng on where you live in Indiana. Though control improves later in the spring, unfortunately so does the chance of off-site target damage to ornamentals, gardens, etc. Amines tend to be less volatile than esters thus reducing the chances for off-target damage later in the spring. To further increase efficacy, apply so the product will dry on the leaf for 24 hours or more before a rain, do not mow immediately prior to application to maximize leaf area, and do not mow for three days following application to allow the products to translocate. If fast burndown is desired, consider using carfentrazone (Quicksilver) in the tankmix. PBI’s Speedzone and Powerzone also contain carfentrazone.