Mag-I-Cal Natural Soil Food

Product Description

One bag of Mag-I-Cal® has the pH adjusting power of up to 15 bags of limestone

  • Rapidly and efficiently raises soil pH
  • Calcium and humates balance soil pH and stimulate microbial life
  • Encourages nutrient absorption

18lb bag 5,000 sq.ft. - $19.98

54 lb bag 15,000 sq.ft. - $49.98

Jonathan Green’s Mag-I-Cal® for Lawns in Acidic  Soil contains calcium carbonate in a completely soluble form that is  immediately available to adjust soil pH upwards. Poor soil is often the  problem in growing a great lawn and calcium is vital to many grass plant  functions.


Lawns thrive in soil with pH levels between 6.2 and 7.0. When the pH  level of the soil is below this range grass becomes light green, weeds  persist, and fertilizer nutrients are not fully absorbed. Mag-I-Cal® Plus also contains humates to stimulate soil microbial life. When soil  chemistry and biology are balanced, nutrients from lawn foods are not  wasted and the grass will thrive.

In-store quantities & prices may vary on some items.
Maximum quantity available reached.

When to Apply:

Best applied during the growing season when the soil is not frozen.   Safe to apply when seeding or sodding.   Spread the product on a dry lawn soon after mowing.


For best results, rake the lawn vigorously prior to application.   Use a rotary or drop lawn spreader.  To select the proper setting see the Spreader Settings open the tab titled SPREADER SETTINGS ONLINE TOOL.

Apply around the perimeter of the lawn to establish a turning area.  Then run the spreader back and forth within the area outlined by your first perimeter application.   Always allow overlap to avoid gaps in coverage.

Can be used on vegetable gardens.


To avoid staining, sweep any excess granules off of hard surfaces and back onto the lawn.   Irrigate the treated area after application for 15 – 30 minutes for the best results.   Once watered, wait a day to mow the lawn to give the product time to activate.   For soils with pH lower than 6, repeat applications twice a year.


Coverage: 3.6 lb Bag – 1,000 sq. ft. 18 lb Bag – 5,000 sq. ft. 54 lb Bag – 15,000 sq. ft.

Fortified With: Soluble calcium

Can Be Used When Seeding: Yes

Apply to Dry or Damp Lawn: Dry

Safe for Children & Pets: Yes

Application Temperature Range: Minimum 45°F

When to Use: Spring, summer or fall


Click the link to the Jonathan Green Product Page and navigate to the Spreader Settings tab for recommended spreader settings. https://www.jonathangreen.com/product/mag-i-cal-lawns-acidic-soil-food.html