Magnesium Sulfate Heptahydrate – 20 lb

Agricultural-grade magnesium sulfate (MgSO4·7H2O) is a high-purity, highly soluble source of magnesium and sulfur — essential nutrients for healthy plant growth. OMRI listed for certified organic production.

Analysis

• Magnesium (Mg): 9.5%
• Sulfur (S): 12.5%
• 1 gram per gallon yields 25 ppm Mg and 33 ppm S

Key Features

• OMRI listed — approved for certified organic growing
• Extremely high water solubility for true clear solutions
• Compatible with most soluble nutrient programs (except concentrated calcium or phosphorus solutions)
• Magnesium is the central element in the chlorophyll molecule — critical for photosynthesis and energy conversion
• Especially important in sandy soils, low-CEC soils, and high-K or high-ammonium-N programs

Ideal Application Methods

• Hydroponic nutrient solutions
• Fertigation: center pivot, drip/trickle, micro-jet
• Foliar spray programs
• Soil amendment for Mg-deficient fields

Packaging

• 20 lb pail