Ironite can’t burn your lawn, but some of its ingredients can burn your yard if not used properly. It all depends on the weather condition of your area. When the temperature is high, there’s a high chance of fertilizer burn.  When you add water-soluble fertilizers to the soil, the soil becomes concentrated. Consequently, this removes water from the grass. This is the reason why your grass appears burnt and scorched. To prevent fertilizer burn, ensure you apply the right amount of fertilizer, water your lawn so you'll not be at risk of having your lawn burnt. If you're using a large amount of fertilizer, don’t forget to remove the excess ones. After that, water the remaining fertilizer to prevent it from burning the grass.