Down to Earth Gypsum
Top Pick
Down to Earth

Down to Earth Gypsum

4.6

Best natural soil conditioner for gardeners managing heavy clay landscapes.

A highly soluble calcium sulfate powder engineered for precision liquid and drip irrigation systems. It offers an efficient way to deliver essential nutrients and improve soil structure without the bulk of traditional granular amendments.

Who it's for

  • Gardeners dealing with compacted or heavy clay soil conditions
  • Growers looking to supplement nutrients without raising soil alkalinity
  • Coastal residents or those managing high-salinity garden environments

Who should skip it

  • Impatient gardeners seeking instant improvements to their soil quality
  • Homeowners with sandy landscapes who need moisture retention instead
  • Individuals with physical limitations or small storage spaces

Performance breakdown

Solubility Efficiency

The 325-mesh grind ensures rapid dissolution for clog-free irrigation systems.

Excellent

Nutrient Concentration

High calcium and sulfur levels provide a potent, targeted mineral boost.

Excellent

pH Stability

Neutral formula improves soil structure without altering existing acidity levels.

Excellent

Application Versatility

Seamlessly adapts to foliar sprays, fertigation, or direct soil drenching.

Excellent

Organic Compliance

OMRI listing guarantees strict adherence to high-standard organic gardening practices.

Excellent

Soil Conditioning

Effectively breaks down compaction to improve drainage and root penetration.

Excellent

Key Specs

Type

Calcium Sulfate

Calcium Content

22.5%

Sulfur Content

17.5%

Calcium Sulfate Dihydrate

97%

Particle Size

325 mesh

pH

Neutral

Organic Certified

Yes

Water Soluble

Yes

Application Method

Foliar, Soil Drench, Fertigation, Drip Irrigation

Pet/Child Safe

No

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