Zinc Sulfate Powder (25 lb bag)

Zinc Sulfate Powder in a 25 lb bag is the primary family option for multiple garden beds, orchards, vineyards, and small-acreage applications. It provides a concentrated, water-soluble source of zinc and sulfur for correcting a deficiency confirmed by soil or plant-tissue testing.

Guaranteed analysis and role

The powder contains 35.5% zinc and 17.5% sulfur. Zinc supports plant enzyme systems, protein formation, and normal growth, but plants require it only in small quantities. Symptoms such as interveinal chlorosis, shortened internodes, or reduced leaf size can have several causes, so testing is more reliable than diagnosis by appearance alone.

This product is not a complete fertilizer. It should be incorporated into a broader fertility plan rather than used as a general-purpose feeding product. Soil pH and interactions with other nutrients can affect zinc availability.

Application options

• Soil application: Incorporate at the rate recommended by a current soil test.
• Foliar application: Published guidance is 2–5 lb per acre, but concentration and crop timing must be managed carefully to reduce leaf burn or fruit marking.
• Fertigation: Use only where the product is compatible with the irrigation system and the calculated rate can be distributed evenly across the intended area.

Measure accurately, avoid inhaling dust, and follow crop- and region-specific recommendations. More zinc is not better; excessive application can damage plants and interfere with other nutrients.

Choose the right package

This 25 lb repack offers more coverage than a small garden package without requiring a full bulk sack. For large farms or repeated applications, see the 50 lb original package.

Organic status: This repackaged 25 lb size is not represented as organic or as listed or approved for certified organic production. The 50 lb package’s OMRI/CDFA status does not transfer to this repack.

Learn about plant micronutrients or compare other trace-mineral fertilizers.

California Proposition 65 WARNING: This product can expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm; for more information, visit www.P65Warnings.ca.gov.

Compare this product with additional nutrient-specific fertilizers selected for garden and farm fertility programs.