Specialty Products

Agstone

Agstone is finely crushed limestone that farmers spread on fields to raise soil pH. It's the same rock as construction limestone, just ground way finer. Most of the pieces pass through a 60-mesh screen, so it feels like coarse powder with some grit mixed in. The active ingredient is calcium carbonate, which reacts with acid in the soil and sweetens it.

"Ag lime" is short for agricultural limestone, and "agstone" is the same thing under a different label. Quality gets rated by Effective Calcium Carbonate Equivalent, or ECCE, which combines how pure the rock is with how fine it's ground. A yard weighs around 2,700 pounds. Price runs low compared to washed decorative stone since it's a raw ground product with no size screening.

named grade in this family

What people use it for

Raising soil pH on farm fields and pasturesAdding calcium for crops and haySweetening acidic garden and lawn soilAmending compost blendsTop-dressing horse arenas and paddocksDust control on unpaved farm roads

How to choose within agstone

Ask before you order

These aren't catalog items. Confirm size, color, and delivery window with the yard before you commit — every load runs differently.

Match the job to the stone

Flagstone, boulders, ballast, glass gravel — each has one right job. Get the job clear first, then the stone follows.

Lead time is longer

A specialty order usually ships slower than a #57 pallet. Plan the delivery date around the material, not the other way around.

All agstone grades

Agstone (Agricultural)

Soil amendmentpH adjustmentFertilizer additive

Other specialty products families

Aglime

Reference

Aglime is limestone that's been crushed and ground into a fine powder or grit.

10 grades→

Sand Blend

Reference

Sand blend is sand mixed with something else to hit a specific job.

7 grades→

Squeegee

Reference

Squeegee is fine crushed rock chips, roughly 1/4 inch and smaller, with the stone dust left in.

4 grades→

Anti Skid Stone

Reference

Anti-skid stone is a small, angular crushed rock you spread on icy roads, driveways, and walkways so tires and shoes can grip.

3 grades→

Grit

Reference

Grit is small, angular crushed stone, usually granite or quartz.

2 grades→

3 Stone

Reference

#3 stone is large crushed rock, roughly 1 1/2 to 2 inches across the biggest pieces.

1 grade→

Asphalt Mix

Reference

Asphalt mix is crushed rock and sand held together by hot liquid asphalt cement.

1 grade→

Ball Clay

Reference

Ball clay is a fine-grained sedimentary clay that's mostly kaolinite, with some mica and quartz mixed in.

1 grade→

Cold Patch

Reference

Cold patch is bagged asphalt you can shovel into a pothole without a hot mix truck.

1 grade→

Field Soil

Reference

Field soil is native dirt scraped and screened straight from open farmland or unused acreage.

1 grade→

Horse Bedding

Reference

Horse bedding is the loose material you spread across a stall floor so a horse has a soft, dry place to stand and lie down.

1 grade→

Masonry Aggregate

Reference

Masonry sand is the fine, clean sand you mix into mortar for laying brick, block, and stone.

1 grade→

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