• All our products are manufactured in California, USA
• Tested by independent third-party laboratories for quality assurance
• Registered with the California Department of Food and Agriculture (CDFA)
• Rigorously tested to ensure products are free from heavy metals

If you're not completely satisfied, we offer a 90-day money-back guarantee. Simply return the unused portion in its original packaging, and we'll process a full refund.

We're committed to sustainable practices, including:

• Biodegradable packaging
• Precise nutrient formulation to reduce runoff
• Support for eco-friendly farming methods

1% of all profits go to our foundation, focused on improving educational opportunities for children.

Manganese sulfate is a water-soluble micronutrient fertilizer containing 31% manganese and 18% sulfur. Manganese is essential for:

• Photosynthesis: Required for the water-splitting reaction that produces oxygen
• Enzyme activation: Activates over 35 different enzymes involved in plant metabolism
• Chlorophyll production: Essential for green color and light absorption
• Nitrogen metabolism: Helps plants utilize nitrogen efficiently
• Disease resistance: Promotes lignin formation for stronger cell walls

Without adequate manganese, plants cannot photosynthesize properly, leading to chlorosis, stunted growth, and eventual death.

Frizzle top is a severe manganese deficiency condition primarily affecting palm trees. The progression includes:

• Early stage: New fronds emerge chlorotic (yellow), small, and weak
• Middle stage: Fronds appear withered, scorched, dwarfed, and distorted - giving the "frizzled" appearance
• Late stage: Only small brown stubs emerge, followed by palm death

Most susceptible palms include Queen Palms, Royal Palms, Pygmy Date Palms, Paurotis, and Coconut Palms. Regular applications of manganese sulfate (every 3 months) prevent this condition by ensuring adequate manganese for chlorophyll production and enzyme function. For severely deficient palms, monthly applications at double rates may be needed until recovery.

Manganese deficiency symptoms vary by plant but typically include:

• Interveinal chlorosis: Yellowing between leaf veins while veins remain green (on young leaves first)
• Gray specks: Small necrotic spots on leaves, especially in cereals
• Stunted growth: Reduced plant height and delayed maturity
• Poor fruit set: Reduced flowering and fruit development
• Specific symptoms: "Marsh spot" in peas, "gray speck" in oats, "frizzle top" in palms

Deficiency is most common in:

• High pH soils (above 7.0) where Mn becomes unavailable
• Sandy soils with low organic matter
• Over-limed soils
• Poorly drained soils where Mn is reduced to unavailable forms

The optimal method depends on your situation:

• Foliar spray (most efficient): 1-3 lbs per 100 gallons provides quick correction within 1-2 weeks. Best for actively growing plants before full leaf expansion.
• Soil application: 20-60 lbs/acre broadcast or 10-30 lbs/acre banded. Less efficient due to soil tie-up but longer lasting.
• Combination with ammonium sulfate: Adding 50+ lbs/acre ammonium sulfate improves Mn availability by acidifying soil microsites.
• For palms: Apply 2-16 oz per tree directly to soil under canopy every 3 months.

Important: Never apply during plant stress, avoid application during bloom on deciduous trees, and ensure thorough coverage for foliar applications.

Organic farming: Manganese sulfate is generally approved for organic production when soil deficiency is documented. Always verify with your certifying agency. Natural sources like manganese oxide may be preferred by some certifiers.

Animal feed: Yes, our manganese sulfate is suitable for animal feed supplementation when mixed into commercial feed (never fed directly). Manganese is essential for:

• Bone development and growth
• Reproductive performance
• Enzyme systems
• Prevention of perosis in poultry

Consult your local agricultural extension service for specific recommendations on usage rates in animal feed.