How to Fertilize New Pasture Seeding

Fertilize before seeding. Most soils will benefit from the addition of fertilizer before new grass is planted. Test the soil first; soil-test kits are sold in garden and farm supply stores. Also, most states have extension services that provide soil tests. The test results show what elements, such as nitrogen or lime, should be added. Add lime before seeding.

Seed at the right time to allow proper development before additional fertilizing. Fall and early spring are usually the best times. For fall seeding, allow time for seedlings to develop before frost. For spring, in most areas, seeding before the ground has fully warmed or thawed often helps the seed get into the ground and establish itself.

Delay fertilizing a new or overseeded pasture until seeds have time to germinate and start establishing roots. Spread fertilizer with a spreader, which distributes it evenly. Avoid heavy concentrations in any one area. Use the proper mix of fertilizer, depending on soil test and type of grass. Nitrogen is the main fertilizing ingredient, but grasses also need phosphorus for good root development. Feed nitrogen in several small doses rather than one large one. Too much nitrogen at one time can actually harm new plants.

Adapt fertilizer to the type of grass and any mixture with legumes. All grasses need nitrogen, but some, like Bermuda, thrive more readily on high-nitrogen fertilizers. Pastures with legumes need less nitrogen because those plants generate nitrogen into the soil.