• Wear chemical-resistant gloves and safety goggles during handling and application
• Use a dust mask or N95 respirator to avoid inhaling fine sulfur particles
• Wear long sleeves and pants to minimize skin contact
• Wash hands and exposed skin thoroughly after handling

• Store in a cool, dry place in the original sealed container
• Keep away from heat sources, open flames, and ignition sources — sulfur is flammable
• Keep out of direct sunlight to maintain product quality
• Store away from oxidizing agents, strong acids, and reactive chemicals
• Keep out of reach of children and pets

• Apply in well-ventilated areas or outdoors only — avoid use in enclosed spaces
• Do not apply near open flames, sparks, or ignition sources (sulfur dust is flammable and can create explosive dust clouds)
• Avoid application on windy days to prevent dust drift
• Water thoroughly after application to settle powder into soil
• Keep pets and children away from application area until powder is watered in
• Do not apply sulfur and lime together or within 2–3 weeks of each other
• Do not exceed 15 lbs per 1,000 sq ft in a single application

• Eye contact: Flush with clean water for 15 minutes. Remove contact lenses if present. Seek medical attention if irritation persists
• Skin contact: Wash affected area with soap and water. Remove contaminated clothing. Seek medical attention if irritation develops
• Ingestion: Do not induce vomiting. Rinse mouth with water. Contact Poison Control (1-800-222-1222) or seek medical attention
• Inhalation: Move to fresh air immediately. If breathing is difficult, seek medical attention. If not breathing, administer CPR and call emergency services

Refer to the Safety Data Sheet (SDS) for complete safety information.

Elemental sulfur, also known as brimstone, is a naturally occurring element (S) essential for all living organisms. In organic gardening, sulfur serves multiple critical functions: it's a vital nutrient for plant growth, helping form proteins and enzymes; it naturally lowers soil pH for acid-loving plants; and it acts as an organic fungicide and pest deterrent. Unlike synthetic alternatives, elemental sulfur is approved for organic gardening and works in harmony with soil biology. For more detail, see our article on What Is the Function of Sulfur in Plants?

Elemental sulfur typically takes 2–8 weeks to begin lowering soil pH, with full effects visible within 3–6 months. The speed depends on soil temperature (works faster in warm soil above 55°F), moisture levels, particle size (finer powder works faster), and soil bacteria activity. For best results, apply sulfur in spring or fall when soil is moist and temperatures are moderate.

When used as directed, elemental sulfur is generally safe around pets and wildlife. It's a naturally occurring element that's less toxic than many synthetic alternatives. Keep pets away during application to prevent dust inhalation, water thoroughly after applying to settle the powder, and store in a secure location. Sulfur effectively repels many pests without harming beneficial insects like bees when used properly.

No — do not apply sulfur and lime together or within 2–3 weeks of each other. Sulfur lowers pH while lime raises it, so using both simultaneously will neutralize their effects and waste product. Always test soil pH before application to determine which amendment you actually need.

The amount varies by soil type. Sandy soils require approximately 10 lbs per 1,000 sq ft to lower pH by 1 point. Loam soils need about 12 lbs per 1,000 sq ft. Clay soils require the most — around 15 lbs per 1,000 sq ft. Use our calculator above for precise amounts based on your specific situation.

Pure elemental sulfur has a mild, characteristic odor that most people find faint and inoffensive. It is much less pungent than sulfur-based compounds like hydrogen sulfide (the classic "rotten egg" smell). The odor dissipates quickly once the powder is worked into the soil and watered in.

Yes — sulfur powder has been used for generations as a natural snake deterrent. Applied as a 2–3 inch wide perimeter band around homes, gardens, or outdoor living areas, it creates a barrier that snakes prefer to avoid. It requires reapplication after rain. For detailed instructions, see our guide on How to Use Organic Sulfur Powder.

Elemental sulfur applied at recommended rates is safe for most plants. However, applying excessive amounts can drop soil pH too low and damage root systems. Sulfur dust applied directly to foliage in hot weather (above 90°F) can cause leaf burn. Always follow application rate guidelines and avoid foliar application during extreme heat.

• Manufactured and packaged in Madera, California, USA
• Tested by independent third-party laboratories for quality assurance
• Registered with the California Department of Food and Agriculture (CDFA)
• Rigorously tested for heavy metal content and synthetic chemical contamination

We stand behind the quality of our Organic Elemental Sulfur Powder. If you're not completely satisfied with your purchase, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging for a full refund, no questions asked.

• Sourced from reputable suppliers meeting organic certification standards
• Supports sustainable and organic farming and gardening practices
• Naturally occurring element with minimal environmental processing

At Greenway Biotech, Inc., we believe in giving back to our community and supporting education for children. 1% of all profits from our organic product sales go to the Greenway Foundation, dedicated to helping children's education and promoting organic gardening in schools.

For more information, visit greenway.foundation.