Boca Hydro Organic Gypsum

Pelletized Calcium Sulfate — 21% Calcium + 17% Sulfur

Boca Hydro Organic Gypsum is a premium pelletized calcium sulfate soil amendment designed to provide plants with two essential secondary nutrients: calcium and sulfur.

The gypsum is finely ground and formed into durable, easy-spreading pellets that balance solubility, handling and extended nutrient availability. After application and watering, the pellets gradually break down in the soil rather than disappearing all at once.

With 21% Calcium and 17% Sulfur, this high-purity pelletized gypsum is ideal for fruit trees, citrus, mango, avocado, field crops, garden beds, vegetables, landscapes and turf. Depending on soil conditions, rainfall, irrigation and application rate, nutrient release can continue over an extended period and remain useful for months after application.

Gypsum supplies calcium and sulfur without adding additional nitrogen, phosphorus or potassium, making it easy to incorporate into an existing fertilizer program when additional calcium or sulfur is needed.

Premium Calcium + Sulfur Nutrition

Calcium and sulfur play important roles throughout plant growth. Calcium supports strong plant structure, active growing points, root development and fruit quality, while sulfur is involved in chlorophyll formation, amino acids, proteins and normal plant metabolism.

21% Calcium

Supplies a substantial source of calcium to help support plant structure, growing tissues, root development and fruit quality.

17% Sulfur

Provides sulfur in sulfate form for plant nutrition without adding additional nitrogen to the fertility program.

No Added N-P-K

Allows growers to supplement calcium and sulfur independently without substantially changing their primary nitrogen, phosphorus or potassium program.

pH Neutral

Gypsum supplies sulfur without functioning like an acidifying elemental sulfur amendment, making it useful where calcium and sulfur are desired without intentionally lowering soil pH.

Ideal Supplemental Amendment: Boca Hydro Organic Gypsum can be incorporated into complete fertility programs for fruit trees, field crops, gardens, landscapes and turf where additional calcium and sulfur are desired.

Pelletized for Extended Nutrient Release

This is not loose gypsum powder. The material is finely ground and pelletized to create uniform granules that spread cleanly while providing a balanced release profile after they contact moisture in the soil. The pellets gradually soften, disperse and dissolve, making calcium and sulfate sulfur available over time.

Extended-Release Pelletized Gypsum

Pelletization helps combine easy handling with controlled breakdown in the soil, avoiding the instant flush associated with highly soluble sulfur fertilizers.

Can Keep Working for Months

Under suitable soil-moisture conditions, the gypsum can continue releasing calcium and sulfate sulfur over an extended period. Actual duration varies with rainfall, irrigation, soil type, temperature and application rate.

Balanced Solubility

The product is designed to provide an initial nutrient release followed by continued availability, helping maintain calcium and sulfur nutrition beyond the day of application.

Easy, Uniform Spreading

Consistent pellets are easy to broadcast by hand or with common fertilizer spreaders and can be blended with other compatible dry fertilizers.

Designed for Extended Availability: Unlike highly soluble sulfate fertilizers that release very quickly, pelletized gypsum provides a more gradual release profile that can continue for months depending on environmental and soil conditions.

Especially Useful for Fruit Trees

Boca Hydro Organic Gypsum is an excellent amendment for established fruit trees and other long-lived crops. Granules can be distributed across the active root zone underneath the canopy and watered into the soil after application.

Mango Citrus Avocado Fruit Trees Vegetables Raised Beds Flowers Shrubs Lawns Landscapes

Why Calcium Matters for Fruiting Plants

Calcium is an important structural nutrient used throughout actively growing plant tissue. Maintaining adequate calcium availability helps support strong cell walls, healthy roots, new growth, flowers and developing fruit.

Supplies plant-available calcium
Supports strong cell walls and plant structure
Supports active root growth and new growing points
Useful during flowering and fruit development
Helps maintain a balanced calcium fertility program
Can supplement calcium without adding additional nitrogen

Why Sulfur Matters

Sulfur is an essential plant nutrient involved in chlorophyll production, protein synthesis, enzyme activity and amino acid formation. Crops with higher nutrient demands can benefit from maintaining an adequate sulfur supply throughout active growth.

Gypsum provides sulfur in sulfate form while simultaneously supplying calcium, making it a convenient two-in-one amendment for complete fertility programs.

Guaranteed Analysis

21% Calcium + 17% Sulfur 92% Calcium Sulfate Dihydrate

Component	Guaranteed Analysis
Calcium Sulfate Dihydrate (CaSO₄·2H₂O)	92%
Calcium (Ca)	21%
Sulfur (S)	17%
Sulfur Form	17% Combined Sulfur
Derived From	Gypsum

Suggested Application Guidelines

Broadcast Boca Hydro Organic Gypsum evenly across the active root zone or soil surface. Avoid piling concentrated material directly against plant trunks or crowns. Water thoroughly after application to begin moving nutrients into the soil.

Application	Suggested Rate	Application Method
Young Fruit Trees	1–2 lb per tree	Spread evenly around the active root zone and water in.
Established Fruit Trees	3–5 lb per tree	Broadcast underneath the canopy and around the drip line.
Large Mature Trees	5–10 lb per tree	Spread throughout the root zone. Applications may be divided if desired.
Garden Beds	5–10 lb per 100 sq. ft.	Broadcast over the surface and work into the upper soil or water thoroughly.
Lawns & Turf	10 lb per 1,000 sq. ft.	Broadcast evenly using a suitable fertilizer spreader.

Application rates are guidelines: Soil conditions, plant size, crop demand, irrigation and existing nutrient levels can all affect the appropriate application rate. Soil testing is recommended when developing a long-term fertility program.

Easy Pelletized Application

Fruit Trees

Broadcast evenly underneath the tree canopy and across the root zone. Keep concentrated granules several inches away from the trunk and water thoroughly.

Garden Beds

Spread evenly across the soil surface before planting or use as a top dressing around established plants.

Lawns & Turf

Apply with a broadcast or drop spreader for even distribution and irrigate after application.

Extended Nutrient Availability

Pelletized gypsum can continue supplying calcium and sulfur over an extended period after application, with release rate influenced by moisture, soil conditions and application rate.

Why Choose Boca Hydro Organic Gypsum?

21% Calcium
17% Sulfur
92% Calcium Sulfate Dihydrate
Finely ground and pelletized for extended nutrient availability
Pellets gradually break down after watering and soil contact
Designed to provide an initial release followed by continued nutrient availability
Can continue working for months depending on soil and moisture conditions
Uniform pellet size for clean and convenient application
Excellent for mango, citrus, avocado and other fruit trees
Suitable for vegetables, gardens, lawns and landscapes
Supplies calcium without additional nitrogen
Supplies sulfur without added N-P-K fertilizer
pH-neutral calcium and sulfur amendment
Easy to broadcast by hand or with fertilizer spreaders
Useful in both home garden and professional growing programs
Can be incorporated into existing fertilizer programs

Important Application Notes

Boca Hydro Organic Gypsum is intended to provide supplemental calcium and sulfur for plant growth. Actual crop requirements vary according to soil type, plant species, plant age, environmental conditions and existing fertility levels.

For best results, use as part of a complete fertility program and maintain consistent irrigation after application. Moisture helps the pellets break down and begin releasing nutrients. Release duration is not fixed and will vary with rainfall, irrigation, soil texture, temperature and application rate. Soil testing can help determine whether calcium, sulfur or other nutrients require adjustment.

Store in a cool, dry location and keep the container closed when not in use.

Boca Hydro Organic Granular Gypsum (Calcium Sulfate) 21% Ca 17% Sulfur Extended Release Calcium + Sulfur