MROOTS is an organic-based fertilizer with an NPK ratio of 3-4-3. This is what we recommend as a “Starter Fertilizer”. When prepping your soil for sod, lay this fertilizer down right before you are laying the sod down (you don’t want it to sit out in the sun, this will kill the beneficial fungi and bacteria). Once your sod is laid on top of the MROOTS, water it all in until damp. MROOTS will activate the roots of your fresh sod and encourage healthy development in your soil.