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Mag-I-Cal® Plus for Lawns in Acidic & Hard Soil
- Natural soil food for lawns in acidic soil
- Helps to rapidly raise soil pH increasing nutrient absorption
- Loosens hard soil promoting air and water penetration for better rooting
- Spreader Settings
- Product Label
- Reviews (13)
Jonathan Green Mag-I-Cal® Plus for Lawns in Acidic & Hard 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. When soil is compacted or too acidic, air, water, and nutrients are unable to reach the roots, making it very difficult for grass to flourish.
Lawns thrive in soil with slightly acidic to neutral pH levels ranging from 6.2 to 7.0. When pH levels drop between 4.0 to 6.0 weeds flourish and the grass becomes light green and spindly. Additionally, Mag-I-Cal Plus® helps to break up clay and compacted soils. This improves root penetration and promotes growth by increasing biological activity and releasing nutrients trapped in the soil.
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 section in the accordion below.
- 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.
- 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.
- 18 lb Bag – 5,000 sq. ft.
- 54 lb Bag – 15,000 sq. ft.
Fortified with: Highly soluble calcium carbonate, fast-acting gypsum, humates, iron, and amino acids
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
The spreader settings listed are approximate. Spreader condition, rate of walk, and humidity are just some of the variables that can affect the rate of application. Please refer to the product label link on this page, or the back of the bag, for further details along with application rates and precautionary statements. You may need to adjust settings for proper coverage if circumstances described on the label are applicable. In all cases, the user should read and follow label instructions before applying any product, and assumes all responsibility when using this spreader settings tool.
Click the button below to view and download a pdf of the product label.
Just moved and the yards were a train wreck. Front: Grass was half brown and the ground was bumpy concrete. Back: Ground like concrete and major ponding during rain. Full-sun areas were grassy. Full shade areas were bare with an occasional weed every 10 feet. Even though it was early spring, I core aerated the lot and spread mag-i-cal plus along with crabgrass preventer. Within two weeks the ground had some give and the ponding was gone. Fast forward three months and an application of Love Your Soil… Front: thick green grass over the entirety. Back: Ground is damp during heavy rains and ponding is gone. Weeds are dying. Grass is taking over the bare areas without seeding. I’m sold!
Hi, I have been using all your products and my lawn is doing great. My question is whether I need to apply fertilizer if I use magical plus? Thanks
JG Response – Yes, you do. Mag-I-Cal Plus raises pH and feeds the soil microbes among other things but it is not a fertilizer as it does not supply nitrogen. Some lawns do see a green-up after application as the soil microbes release trapped nutrients when they are biologically active.
I love all your products. Will never buy anyone else\’s. So far more professional than the average lawn guy wants. J.G. has the highest elite products that exist for the home owner. Magical last fall raised my ph quite a bit this spring, and topped it off with magical plus this spring. My pH is right on. Going to buy love your soil soon so I can apply it going into summer. My soil will be so microbial active and porous and aerated. I\’m all in. Totally addicted to Jonathan Green. I thought I had some nice kbg until I renovated with BB-ultra. Now I wish every grass blade on my property was j.g. ultra. I kid you not. Thank you j.g.
I love your products, much better than Scott’s. My lawn is truly beautiful. The only complaint I have is your suggested application rates. Let’s take Magical Plus. The bag says to apply at 1&1/2 with a Scott’s drop spreader. Their spreader starts at 2 so that’s what I did. Your website says to set a Scott’s Classic drop spreader at 2.5. Which is it? I bought a 15,000 square ft bag that should have allowed me to do approximately 3 family homes. I did 5 with some to spare.(Yes, I checked the calibration before I started each house.) Conversely, I have used some of your synthetic weed and feed products (I do 4 treatments a year) that claim to cover 5,000 sf. Wrong! I needed to purchase more despite personally having a roughly 6,000 sf property including the house and flower beds. Accordingly, I should have had left overs. Your products are wonderful; however, you need to “get it together” with your coverage rates.
I have been using mag-i-cal plus since 2017. Mag-I-Cal has been the big difference in the lawn. The product is all that was advertised. We now use all Jonathan Green products for our annual lawn maintenance. PS. Our Jonathan Green supplier recommended that we maintain grass height at 3.75″ or higher. Thanks for the help and advice.
I bought Jonathan green magical plus and just put it down. The soil test from yard mastery concluded my pH was 5.7. I will retest my soil pH level late summer early fall to see if it has raised then I will put results on here. So far so good. I have about 15,000sqft. I bought 2 big bags cuz it says under 5.9 pH I need to apply at rate of 1 big bag per 7500sqft. So I applied 2 big bags. Can someone from Jonathan Green answer this question…. Will too much of this product hurt my lawn??? I just get so nervous because my lawn is very beautiful thanks to the help of liquid bio stimulants. I want to adjust the pH without using 200 lb of lime. So I chose the magical plus product I just get nervous somebody from Jonathan Green please tell me everything will be all right…. Lol
Jonathan Green Response:
Hi Jeff, We’re very happy to hear you’ve enjoyed using Mag-I-Cal® Plus for Lawns in Acidic & Hard Soil. This product is not like a lawn fertilizer that will burn your lawn but applying too much of this product could potentially make your soil’s pH alkaline. Since your soil is naturally acidic, the amount of product that you applied should be just fine. You wish to recheck your pH, wait three weeks and test it again. At that point, you will be able to see if your soil pH is neutral or if you need to apply more product. Thanks! – Jonathan Green Customer Service.
Moved into a new home May 2020 with terrible lawn compacted clay soil… Killed off the backyard grass, tilled it up and put Mag-I-Cal Plus along with Green Up and Tri-Rye first of Oct… WOW.. We have a beautiful very green lawn.. Will continue the program in the Spring and reseed with Black Beauty….
At the recommendation of my local hardware store I tried Mag-I-Cal. This was back in April. When I tested the soil pH a month later it had actually gone down. I added regular lime and the lawn started to green up, and the pH went up by half a point. I’m moving on from Mag-I-Cal.
JG Response: Please email us at email@example.com. Did you use Mag-I-Cal for Lawns in Acidic Soil or Mag-I-Cal Plus for Lawns in Acidic Soil? What soil kit was used? If it was one with a powder, then alkaline water could have skewed the test. Mag-I-Cal is five times stronger than regular lime. Regular lime also takes a long time to raise pH, therefore, it is highly doubtful the regular lime had any effect that quickly. April temperatures were fairly cold. It is likely that once the soil temperatures warmed up, then the Mag-I-Cal began to work.
I love the fact that I can correct my soils pH and fix soil compaction with one product.
This is the second year I’ve used this product. My lawn has kept its green color even in the heat.
I applied the Mag-I-Cal plus to my lawn on 6/3/20 just before a heavy rain. The lawn is on week 5 so I\’m do for another round of Fertilizer. Within 3 days after applying Mag-I-Cal plus the lawn def looked much better.!!! My last soil test 4/28/20 showed my ph at 5.2 so I still have more work to do to bump the ph higher.
I have to admit that I was very skeptical about Love Your Soil and Magi-I-Cal Plus but after using both products for less than one year, I’m a true believer! Like many households in North Carolina, my clay soil was extremely compact and very hard to work with even after amending it with screened compost and peat moss. After using both products my soil appears to be less dense, I don’t have puddles of standing water and my grass is deep green even during extended periods of drought. My lawn might not be picture perfect yet but I finally feel that I’m on the correct path to a much healthier soil and lawn. Thank you for making professional grade products available to home owners.
Grass had zero weeds and came in thick.
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