For soils with a pH over 5.9, use the new lawns rate.
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Jonathan Green Mag-I-Cal® for Lawns in Acidic SoilOne bag of Mag I Cal has the pH adjusting power of up to 15 bags of limestone! Rapidly raises and balances low soil pH Stimulates microbial life to create a healthy environment for grass Increases grass roots ability to absorb nutrients Product Overview Adjust your soil with Mag I Cal! Jonathan Green Mag I Cal for Lawns in Acidic Soil helps rapidly raise soil pH that's too low and stimulates healthy microbes in the soil. Healthy, lush lawns thrive in
- One bag of Mag-I-Cal® has the pH adjusting power of up to 15 bags of limestone!
- Rapidly raises and balances low soil pH
- Stimulates microbial life to create a healthy environment for grass
- Increases grass roots ability to absorb nutrients
Product Overview
Adjust your soil with Mag-I-Cal®! Jonathan Green Mag-I-Cal® for Lawns in Acidic Soil helps rapidly raise soil pH that's too low and stimulates healthy microbes in the soil. Healthy, lush lawns thrive in soils with slightly acidic to neutral pH levels ranging from 6.2 to 7.0. When soil pH levels drop between 4.0 to 6.0, this creates an environment for weeds to thrive and grows a lawn full of light green unsightly grass.
Mag-I-Cal® for Lawns in Acidic Soil contains pelletized calcium carbonate, or lime, in a completely soluble form that is immediately available to rapidly and efficiently raise soil pH upwards. Poor soil is often the problem in growing a great lawn and calcium is vital to many grass plant functions. Where it may take several bags of lime to balance low soil pH, Mag-I-Cal® for Lawns in Acidic has the power to do it all in just one easy application!
Additionally, Mag-I-Cal® for Lawns in Acidic contains humates to stimulate beneficial microbes in the soil.
Coverage Guide
Coverage:
| Size |
Established Lawns
|
New Lawns |
| 18 lb | Up to 5,000 sq. ft. | Up to 2,500 sq. ft. |
| 54 lb | Up to 15,000 sq. ft. | Up to 7,500 sq. ft. |
Where to Apply
This product can be applied throughout the United States and performs well on both cool and warm-season lawns.
When to Apply
For cool and warm season lawns, apply in either spring, summer or fall when air temperatures are at least 45°F.
Active Ingredient(s)
Calcium (Derived from: Calcium Carbonate)
Also contains non-plant food ingredients: humic acid (derived from humus), polyhydroxycarboxylic acids (derived from plant extracts).
Use With Other Products
Mag-I-Cal® for Lawns in Acidic Soil contains natural ingredients and can be applied with any of our grass seeds, weed controls, fertilizers, and insect and lawn disease controls.
How Often to Apply
- For a pH of 5.9 to 6.7:
Apply Mag-I-Cal® Plus for Lawns in Acidic & Hard Soil once per year.
- For a pH of 5.9 or below:
Apply Mag-I-Cal® Plus for Lawns in Acidic & Hard Soil twice per year (at least one month apart).
Safe for Children & Pets
Mag-I-Cal® for Lawns in Acidic Soil is a natural product, meaning it is safe for children and pets to re-enter the lawn immediately after application.
Precautions & Proper Handling
- Carefully read all instructions prior to application.
- Store in a cool, dry place away from children and pets.
- Do not ingest. May cause irritation to eyes and skin.
- Wash hands thoroughly with soap and water after handling and before eating or drinking.
- Do not apply near water, storm drains, or drainage ditches.
- Do not apply if heavy rain is expected.
- Apply this product only to your lawn or garden and sweep any product that lands on the driveway, sidewalk or street back onto your lawn or garden.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 1410 reviews
Sort
Product Reviews
★★★★★ 5
Great quality
Size: Small, Color: Dark Grey Long Sleeve
Fast, and exactly as described.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 4
Wash before wearing — the dye will run
Size: Small, Color: Royal Blue
Make sure you wash this shirt before wearing. Maybe even two washes. The color WILL run and dye your skin. (I was impatient and wore it before washing and ended up with a blue torso)
Otherwise, it fits well. I’d put it as a regular fit rather than a slim fit. Very soft, albeit synthetic, material.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 21, 2026
★★★★★ 5
Black
Size: Medium, Color: Black
Fit well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 5, 2026
★★★★★ 3
Good Fit but too long
Size: Medium, Color: Army Green
I would give these shirts a 5 star rating if they weren’t so long over the waist, even a medium sized it doesn’t matter way too long
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
A T-shirt chic? YES!!
Size: X-Large, Color: Wine Red
This is the second one of these shirts I’ve ordered. I don’t wear ties anymore, so I actually wear this mock turtle neck under a blazer, or a sports coat as my father used to call them. I wore a blue one the other evening and I wore it underneath a plaid blazer. Whoever would guess a T-shirt could be quite so chic. It stretches plenty, it’s light and it’s so comfortable. I have two of them now and I’m deciding on a third one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026