Down to Earth Garden Gypsum | 5lb - OMRI Listed - (Case of 6)

Calcium and Sulfur Amendment That Loosens Heavy Clay Soil Without Raising pH, 5lb

Heavy clay soil resists drainage and root penetration in a way that lime can't fix without also pushing pH higher than a planting might need. Down To Earth Garden Gypsum addresses the structure problem directly — calcium ions from the gypsum bind clay particles into larger aggregates, opening pore space for water and roots — while supplying calcium and sulfur without the pH shift that comes with liming.

The 5lb bag, sold as a case of six, is convenient for home gardeners applying gypsum regularly to lawns, garden beds, or clay-heavy soil to improve structure and drainage.

Key Features & Benefits

• Adds calcium and sulfur — supplies two essential plant nutrients while improving soil physical condition.
• OMRI Listed — approved for certified organic production.
• Loosens heavy clay soils — calcium ions bind clay particles into larger aggregates, improving pore space and drainage.
• Does not significantly raise pH — unlike lime, gypsum supplies calcium without shifting soil pH.

Who Should Use Down To Earth Garden Gypsum

This fits home gardeners, lawn care crews, and growers working with heavy clay soils, compaction, or alkaline, sodic, and saline soil conditions who need calcium and sulfur without the pH increase a liming product would cause.

About Down To Earth Garden Gypsum

Garden Gypsum is one of the mineral soil amendments Down To Earth Distributors has manufactured at its Eugene, Oregon facility since 1977, part of an OMRI Listed catalog built without synthetic fillers.

Frequently Asked Questions

Does Garden Gypsum raise soil pH like lime does?

No, unlike lime, gypsum doesn't significantly raise soil pH. That makes it useful when calcium is needed but the soil is already at or near its target pH range.

How does gypsum improve heavy clay soil?

Calcium ions from gypsum interact with clay particles and help bind them into larger aggregates, which opens up pore space and improves water infiltration and root penetration. This is a structural effect, separate from its role as a calcium and sulfur nutrient source.

Is Down To Earth Garden Gypsum OMRI Listed?

Yes, Garden Gypsum carries OMRI Listing. It's mined calcium sulfate with no synthetic processing added, which is what qualifies it for certified organic use.

Can Garden Gypsum help with alkaline or saline soils?

Yes, it's also used to help remediate and revitalize alkaline, sodic, and saline soil conditions, in addition to its clay-loosening effect. Results depend on how severe the underlying soil chemistry issue is, so a soil test helps set expectations.

Can Garden Gypsum be used on lawns as well as garden beds?

Yes, it can be applied to lawn areas to help improve the physical condition of compacted or clay-heavy soil under turf. Follow the current label rate, since lawn and bed application rates can differ.