Elemental Sulfur
Type: Mineral Release: Very slow NPK: 0-0-0 (S)

Lowers soil pH gradually via microbial oxidation; used to acidify alkaline soils.
๐ฏ What It's Best For
- blueberries
- azaleas
- acid-loving plants
๐ซ Not Ideal For
- already acidic soils
๐งช Application & Dosage
Method: Incorporate lightly; allow weeks to months for effect.
Rate: 10โ30 g per mยฒ (based on pH)
Timing: Pre-plant or off-season
Frequency: Infrequent; monitor pH
โ๏ธ Soil & pH
Soil pH Preference: alkaline (to reduce)
โ ๏ธ Cautions
Slow; avoid over-acidification.
๐ Where to Buy
- plant nurseries
- garden centers
๐ท๏ธ Tags
pH downsulfur
Note
Values are typical approximations. Always follow your specific product label and adjust for pot size, plant type, and local weather. In containers, flush with plain water occasionally to prevent salt buildup.