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Jonathan Green Mag-I-Cal Plus for Lawns in Acidic and Hard Soil Annual Program Lawn Conditioner For
Jonathan Green Mag-I-Cal Plus for Lawns in Acidic and Hard Soil Annual Program Lawn Conditioner For
Jonathan Green Mag-I-Cal Plus for Lawns in Acidic and Hard Soil Annual Program Lawn Conditioner For
Jonathan Green Mag-I-Cal Plus for Lawns in Acidic and Hard Soil Annual Program Lawn Conditioner For

Jonathan Green Mag-I-Cal Plus for Lawns in Acidic and Hard Soil Annual Program Lawn Conditioner For

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Corrects acidic, hard soil so the rest of your lawn feeding program actually works, with iron for color and coverage up to 15,000 sq ft.
Jonathan Green MPN 11355 In Stock & Ready to Ship
$59.99
Ships $39.99 flat · large item
Heavy item · ships $39.99 flat Large items cost more to ship. Prefer to skip it? This is one to grab locally — no box, no shipping. Check your local store below ↓

About Product Overview

Mag-I-Cal Plus for Lawns in Acidic and Hard Soil is Jonathan Green's answer for lawns struggling with soil pH problems that regular fertilizer can't fix. This granular lawn conditioner works into dry, compacted, or acidic soil to help grass take up nutrients more effectively, setting up the rest of your feeding program to actually work. It's organic, phosphorus-free, and includes iron for color, making it a solid fit for homeowners running an annual lawn care program rather than a one-time fix. The 54 lb bag covers up to 15,000 sq ft, enough for most large yards, and it's labeled safe for Bermuda grass along with all other grass types. Apply dry, any time during the growing season, whether you're maintaining an established lawn or prepping ground for seeding.

  • Coverage: up to 15,000 sq ft
  • Organic granular formula, phosphorus-free
  • Contains iron for lawn color
  • Works on all grass types, including Bermuda grass
  • Pre-emergent, suited for annual lawn programs
  • Made in the USA

The Details Specifications

Brand Jonathan Green
Model / MPN 11355
UPC 079545113551
Weight 54 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Jonathan Green. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Jonathan Green

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Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
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Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

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