Secondary Lawn Nutrients


Secondary nutrients are nutrients that are usually found in lawn soil in adequate quantities, so applications of these lawn nutrients are not always needed.

Calcium (Ca):

  • Present in turf plants in the third largest quantity behind nitrogen and potassium
  • Essential part of plant cell wall structure and accumulates in older plant tissues
  • Generally sufficient in the soil and therefore not often required as a nutrient in fertilization programs
  • When needed, Calcium is supplied when lime is applied to acidic soils

Magnesium (Mg)

  • Part of the chlorophyll in all green plants and essential for photosynthesis
  • Helps activate many plant enzymes needed for growth
  • Applied as a dolomite to maintain active growth and dark green color
  • When needed, Magnesium is supplied when lime is applied to acidic soils

Sulfur (S)

  • Helps with vigorous plant growth and resistance to cold
  • Required by turfgrass plants in similar quantities to Phosphorus
  • Generally sufficient in the soil and therefore not often required as a nutrient in fertilization programs
  • Sulfur can be added to your lawn naturally; it is usually found in sufficient amounts from rainfall or the decomposition of soil organic matter. Mulching grass clippings also helps add Sulfur to lawns

Of course, only a trained lawn care professional can help determine which secondary nutrients your lawn is lacking and which kinds of fertilizers are best to deliver these lawn nutrients to your turf.

Scotts LawnService is the trusted industry leader for professional quality lawn care. Our exclusive lawn care products include premium grass seeds and professional-grade fertilizers; our lawn service teams are comprised of highly trained, industry-certified professionals. Contact a representative today for turf and lawn fertilizer available in your area and to learn how you can enjoy a lush, thicker lawn that only Scotts LawnService can deliver.