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

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

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Granular soil conditioner made for alkaline and hard soil, covering 5,000 sq ft without added phosphorus.
Jonathan Green MPN 11356 In Stock & Ready to Ship
$29.99
Free shipping on orders over $149
Ships within 24 hours · most orders arrive in about 2 business days
Ships free on orders over $149 $14.99 flat shipping until your order reaches $149.

About Product Overview

Mag-I-Cal Plus for Lawns is Jonathan Green's granular soil conditioner built specifically for alkaline and hard soil conditions, where grass often struggles to take up nutrients. Applied dry, it works across all grass types and is safe for Bermuda grass, making it a solid fit for an annual lawn care program. This 18 lb bag covers up to 5,000 sq ft and is phosphorus-free, so you get conditioning without the extra phosphorus most lawns don't need.

  • Coverage: 5,000 sq ft per 18 lb bag
  • Form: Granules, dry application
  • Grass Type: All grasses, safe for Bermuda
  • Phosphorus-free formula
  • Organic; made in the USA
  • Use as pre-emergent as part of an annual program

The Details Specifications

Brand Jonathan Green
Model / MPN 11356
UPC 079545113568
Weight 18 lbs
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

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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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