Question: I've just had new sod laid on my yard and now realize that the soil underneath isn't very good. Do I have to remove the sod to improve the soil? Answer: The perfect way to use John and Bob's GrowGreen products is to apply them on top of the soil right before you lay the sod. Or, if the sod is already down, apply on top of the grass as package directions outline. Then continue to condition your soil every 6-12 months by applying them over the top of your grass. This should be done right after a mowing to minimize the possibility of picking up granules with the mower before they begin to break down and dissolve.