Since all of these products affect seedlings differently, check the label for specific restrictions on applications in and around seeding. Generally, you must wait 28 days or more after emergence of the desirable grass to apply these products. Our recent research suggests Dimension and Drive can be applied safely to creeping bentgrass, tall fescue, perennial ryegrass, and Kentucky bluegrass seedlings and may result in future label changes, but follow your current label to ensure safety. To further minimize risk of herbicide damage, spot treat trouble areas if possible and wait as long as feasible before use in order to let the stand mature. Turf and Calcium Fertilizer Dotted throughout the professional trade journals right now are products touting the potential benefits of calcium fertilization on turf.
Calcium plays an integral role in cell wall development.
Theoretically, this implies the more calcium in the system, the thicker the cell walls of turf plants and the better the traffic tolerance of those plants. However, I have not seen any data verifying this claim. Limestone is the parent material for most of the soils throughout much of Indiana and the Midwest. Therefore calcium is at adequate, if not at excessive levels, in our soils. Consistent with my philosophy of not applying pesticides or N, P, and K fertilizer when none is justified, Calcium should not be applied when it is not justified.