Boca Hydro Magnesium Sulfate Water-Soluble Fertilizer 16% Magnesium 32% Sulfur

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Sku: BHMS1LB
Categories: 2FEATURED, Nutrients, Fertilizer and Supplements
Vendor: Boca Hydro LLC

Boca Hydro Magnesium Sulfate

High-Purity Water-Soluble Magnesium & Sulfur for Hydroponics, Fertigation & Soil Growing

Boca Hydro Magnesium Sulfate is a premium-grade, fully water-soluble plant nutrient designed to provide a clean and readily available source of magnesium and sulfur for professional growers, hydroponic systems, gardens, fruit trees, vegetables, ornamentals, and container plants.

Magnesium is an essential component of chlorophyll and plays a major role in photosynthesis, enzyme activity, nutrient movement, and plant energy production. Sulfur is also an essential secondary nutrient involved in amino acid formation, protein synthesis, and normal plant growth.

This highly soluble formula dissolves quickly and cleanly in water, making it ideal for hydroponics, fertigation, concentrated stock solutions, foliar feeding, soil drenches, and direct soil applications.

Fully Water Soluble Hydroponics Grade Low Salt Formula Magnesium & Sulfur Fertigation Ready Soil & Hydroponics

Ideal for supplementing magnesium and sulfur without adding significant nitrogen, phosphorus, potassium, or calcium to an existing fertilizer program.

Product Benefits
Supports Chlorophyll Production Magnesium is a central component of chlorophyll and helps plants maintain healthy green foliage and efficient photosynthesis.
Supports Photosynthesis Adequate magnesium nutrition helps plants capture and use light energy efficiently for normal growth and development.
Supports Plant Metabolism Magnesium participates in enzyme activation, energy transfer, nutrient movement, and other important metabolic processes within the plant.
Provides Essential Sulfur Sulfur supports amino acid and protein formation and contributes to healthy plant growth, development, and overall crop performance.
Clean Water Solubility Dissolves quickly and cleanly for use in hydroponic reservoirs, fertigation systems, irrigation injectors, foliar sprays, soil drenches, and stock solutions.
Flexible Nutrient Supplement Provides magnesium and sulfur without significantly increasing nitrogen, phosphorus, potassium, or calcium, allowing growers greater control over complete fertilizer programs.
Ideal for Multiple Growing Systems
Hydroponics Provides a highly soluble source of magnesium and sulfur for precision hydroponic nutrient formulations and reservoir management.
Fertigation Suitable for use with fertilizer injectors and irrigation systems when supplemental magnesium and sulfur are required.
Soil Growing Can be applied through irrigation water, soil drenches, or direct soil applications to supplement plant magnesium and sulfur nutrition.
Pots & Containers Useful for container-grown plants where repeated watering and fertilizer use can create specific magnesium requirements.
Foliar Feeding Fully water-soluble for properly diluted foliar applications when rapid supplemental magnesium nutrition is desired.
Fruit Trees & Gardens Suitable for citrus, avocado, mango, tomatoes, peppers, vegetables, flowering plants, ornamentals, and other magnesium-responsive crops.
Understanding Magnesium Deficiency
Older Leaves First Magnesium is mobile within plants. When magnesium is limited, plants can move it from older leaves toward new growth, so deficiency symptoms often appear first on lower or older foliage.
Interveinal Chlorosis One of the most recognizable signs of magnesium deficiency is yellowing between the leaf veins while the veins themselves remain green.
Advanced Deficiency As deficiency progresses, affected leaves may develop discoloration, reddish or purple coloration in some crops, tissue damage, or premature leaf drop.
Plant Performance Maintaining adequate magnesium nutrition helps support chlorophyll formation, photosynthesis, nutrient balance, plant metabolism, and consistent growth throughout the growing cycle.
Grower Tip: Magnesium sulfate is an excellent supplemental nutrient when a fertilizer program requires additional magnesium and sulfur without substantially changing nitrogen, phosphorus, potassium, or calcium levels. For best results, consider the magnesium already present in your source water and base fertilizer when determining application rates.
Mixing Note: Boca Hydro Magnesium Sulfate can be used with many fertilizer programs. When preparing highly concentrated stock solutions, always check fertilizer compatibility before combining multiple nutrient salts in the same stock tank. Separate concentrates may be appropriate where precipitation or incompatibility is possible.

Boca Hydro Magnesium Sulfate Dosing PDF

Boca Hydro Magnesium Sulfate SDS

Boca Hydro Magnesium Sulfate Dosing Guide

Water Soluble Magnesium & Sulfur Plant Nutrient

Water Soluble Product: Always dissolve in water before foliar spraying, hydroponic use, liquid feeding, or fertigation.

Stock Solution / Liquid Concentrate: Dissolve 1.1 lb / 500g of Boca Hydro Magnesium Sulfate into enough water to make 1 gallon of finished concentrate.

Liquid Concentrate Strength: 1 tsp concentrate ≈ 0.66g product | 1 tbsp concentrate ≈ 1.98g product | 1 fl oz concentrate ≈ 3.91g product

Nutrient Contribution: 1 gram of dry product per gallon contributes approximately 25.6 ppm elemental magnesium and 33.8 ppm elemental sulfur.

Foliar Spray

Application Dry Rate Liquid Concentrate
Maintenance 1–2g per gallon 1½–3 tsp per gallon
Deficiency Correction 3–5g per gallon 1½–2½ tbsp per gallon

Pots & Containers

Plant Size Dry Rate Liquid Concentrate
Small Plants 1–2g per gallon 1½–3 tsp per gallon
Medium Plants 3–5g per gallon 1½–2½ tbsp per gallon
Large Plants 6–8g per gallon 3–4 tbsp per gallon

Soil Drench

Application Dry Rate Liquid Concentrate
Light Feed 10–15g per 5 gallons 5–7½ tbsp
Heavy Feed 20–25g per 5 gallons 10–12½ tbsp

Hydroponics

Target Mg Dry Rate Liquid Concentrate
25 ppm Mg 0.98g per gallon 7.4mL / approx. 1½ tsp
50 ppm Mg 1.95g per gallon 14.8mL / approx. 1 tbsp
75 ppm Mg 2.93g per gallon 22.2mL / approx. 1½ tbsp
100 ppm Mg 3.90g per gallon 29.5mL / approx. 2 tbsp

Fertigation / Injector Use at 1:100

Final Mg Target Product per Gallon of Stock Approx. Weight Injection Ratio
25 ppm Mg 97.6g per gallon stock 3.44 oz Inject at 1:100
50 ppm Mg 195.1g per gallon stock 6.88 oz Inject at 1:100
75 ppm Mg 292.7g per gallon stock 10.32 oz Inject at 1:100
100 ppm Mg 390.2g per gallon stock 13.76 oz Inject at 1:100

Dry Ground Application / Water-In Use

Application Rate Directions
Direct Soil Application 1–2 tsp per square foot Spread evenly over the soil surface and water thoroughly after application.
Routine Supplementation Use lower rate Use when providing supplemental magnesium and sulfur as part of an ongoing fertility program.
Higher Magnesium Demand Use upper rate Use when additional magnesium is required. Avoid unnecessary repeated applications where soil magnesium levels are already adequate.

Important Application & Mixing Notes

Magnesium sulfate provides magnesium and sulfur but does not provide a complete nutrient profile. Use as part of a balanced fertilizer program when additional magnesium or sulfur is required.
When preparing concentrated fertilizer stock solutions, check compatibility before combining magnesium sulfate with other concentrated fertilizer materials. Separate stock tanks may be required when precipitation or incompatibility is possible.
Always begin with lower application rates on sensitive crops or unfamiliar varieties. Test foliar applications on a small area before widespread spraying. Avoid foliar spraying during extreme heat or intense sunlight.

Guaranteed Analysis

Nutrient Guaranteed Analysis
Magnesium Oxide (MgO) 16.00%
Magnesium (Mg) 9.70%
Sulfur Trioxide (SO3) 32.00%
Sulfur (S) 12.80%
Derived From: Magnesium Sulfate
CAS No: 10034-99-8