Jonathan Green Mag-I-Cal Lawn Fertilizer

Mag-I-Cal is specifically designed to raise soil pH. You should test your soil first; if your pH is below 6.0, this product will help unlock nutrients that are currently trapped in the soil and unavailable to your grass.

Yes, this formula is safe to use when planting new grass seed or laying sod. It helps create a more hospitable soil environment for new roots to establish.

Because it features highly soluble calcium, Mag-I-Cal works more rapidly than traditional pelletized lime. While soil chemistry changes take time, you can expect to see improved nutrient uptake and turf health throughout the growing season.

Mag-I-Cal is a soil amendment rather than a traditional N-P-K fertilizer. It focuses on balancing soil pH to make your existing fertilizer more effective, so you should continue your regular feeding schedule alongside it.

For soils with a pH below 6.0, we recommend applying it twice per year. Because it is effective throughout the growing season, you can apply it in the spring, summer, or fall depending on your soil test results.