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Item Number: F2101

Calphos Soft Rock Phosphate - Regular Powder (50 lb)

Calphos Soft Rock Phosphate - Regular Powder (50 lb)

Colloidal Phosphate for Slow-Release

The best natural fertilizer source of phosphorus and calcium. It is comprised of the bony structures of prehistoric marine creatures mined in Florida from the best deposit in the country. An immediately available and a long-term source of phosphorus. Not the same as the hard rock phosphate, sold by most nurseries and farm suppliers, which is not nutritionally as readily available.

  • Averages 20% P2O5 (3% immediately available), 20% Calcium

  • Soft Rock Phosphate Fertilizer should be applied and worked in prior to planting

  • Use at 5 lb per 100 square feet or 1 ton per acre on phosphate deficient soils, less on fertile soils

  • Trees and perennials in vegetable garden for flowering plants, use 1-10 lb per planting hole, depending on plant size

  • Supplies phosphorus (P) and calcium (Ca) for up to 5 years after application, depending on the crop

Healthy soil provides the foundation for robust plant growth, increased crop yields, and the long-term vitality of agricultural ecosystems. Calphos Soft Rock Phosphate, a valuable soil amendment, plays a pivotal role in bolstering soil health and ensuring the success of organic farming practices.

Soft rock phosphate, a natural and slow-release fertilizer, is an invaluable resource for enriching garden soils. While it requires only a small amount to be effective, soft rock phosphate provides plants with an essential nutrient: phosphorus. This nutrient is crucial for plant growth and development, playing a key role in processes such as photosynthesis, energy transfer, and the formation of cell walls.

Before application, it's advisable to conduct a soil sample to determine phosphorus levels and ensure proper dosage. By incorporating soft rock phosphate into garden soils, gardeners can improve soil fertility and support healthy plant growth in a sustainable and eco-friendly manner.

Understanding Calphos Soft Rock Phosphate:

Calphos Soft Rock Phosphate, derived from natural geological deposits, is a finely ground powder rich in essential plant nutrients, primarily phosphorus. Unlike synthetic fertilizers, which can harm the environment and disrupt the delicate balance of soil microbiota, soft rock phosphate is a natural and eco-friendly source of nutrients.

The Benefits of Calphos Soft Rock Phosphate in Agriculture:

  1. Phosphorus Enrichment: Phosphorus is a vital nutrient for plant growth and development. It plays a central role in processes such as photosynthesis, energy transfer, and root formation. Calphos Soft Rock Phosphate supplies a steady and long-lasting source of phosphorus to the soil, enhancing the nutrient profile necessary for healthy crop growth.

  2. Sustainable Nutrient Release: One of the key advantages of Calphos Soft Rock Phosphate is its slow-release properties. Unlike water-soluble synthetic fertilizers that can lead to nutrient leaching and environmental pollution, soft rock phosphate gradually releases phosphorus into the soil, matching plant demand and minimizing nutrient runoff.

  3. Enhanced Root Development: Adequate phosphorus levels are essential for robust root development. Calphos Soft Rock Phosphate promotes the growth of strong and healthy root systems, enabling plants to access water and nutrients more effectively. This, in turn, enhances their overall resilience and ability to withstand environmental stressors.

  4. pH Adjustment: Soft rock phosphate also serves as a pH regulator in the soil. It helps balance soil pH levels, making them more conducive to nutrient uptake by plants. This adjustment is particularly valuable in soils that tend to be acidic, as it creates a more favorable environment for plant growth.

  5. Beneficial Microbial Activity: Healthy soil teems with beneficial microorganisms that contribute to nutrient cycling and overall soil fertility. Calphos Soft Rock Phosphate supports the proliferation of these vital microorganisms, fostering a dynamic and thriving soil ecosystem.

How to Use Calphos Soft Rock Phosphate:

The application of Calphos Soft Rock Phosphate in agriculture is straightforward:

  1. Soil Preparation: Before planting, incorporate the soft rock phosphate powder into the soil. The recommended application rate may vary depending on soil test results and specific crop requirements. Typically, it is advisable to apply between 100 to 400 pounds per acre.

  2. Mixing: Calphos Soft Rock Phosphate can be blended with other organic soil amendments, such as compost or well-rotted manure, for a comprehensive and balanced soil enrichment strategy.

  3. Incorporation: Work the soft rock phosphate into the top few inches of soil using traditional farming practices like tilling or plowing. This ensures even distribution and accessibility to plant roots.

  4. Crop-Specific Timing: For best results, apply Calphos Soft Rock Phosphate in advance of planting or during the early stages of crop development. This allows sufficient time for the slow-release nutrients to become available to the plants as they grow.

  5. Regular Testing: Soil testing is a valuable practice for monitoring nutrient levels and ensuring that phosphorus remains within optimal ranges. Adjust the application rate based on soil test recommendations.

Calphos Soft Rock Phosphate stands as a natural and sustainable solution for enhancing soil health in agriculture. Its slow-release phosphorus content, pH-adjusting capabilities, and support for beneficial microbial activity make it a valuable asset for organic and sustainable farming practices. By incorporating Calphos Soft Rock Phosphate into their agricultural routines, growers can foster healthier soil, improve crop yields, and contribute to the long-term sustainability of their farming operations while minimizing environmental impact.

Any other fertilizing needs can be mitigated by checking out our other fertilizers and growing supplies.

Listed for Use in Organic Agriculture by the Organic Materials Review InstituteApproved for Organic Agriculture by the California Department of Food and Agriculture
Quantity Discounts for Calphos Soft Rock Phosphate - Regular Powder (50 lb)
Buy 5 for $21.84 each
Buy 10 for $20.69 each
$22.99
Discount applied. Offer ends soon.
Next-day shipping available

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Description

The best natural fertilizer source of phosphorus and calcium. It is comprised of the bony structures of prehistoric marine creatures mined in Florida from the best deposit in the country. An immediately available and a long-term source of phosphorus. Not the same as the hard rock phosphate, sold by most nurseries and farm suppliers, which is not nutritionally as readily available.

  • Averages 20% P2O5 (3% immediately available), 20% Calcium

  • Soft Rock Phosphate Fertilizer should be applied and worked in prior to planting

  • Use at 5 lb per 100 square feet or 1 ton per acre on phosphate deficient soils, less on fertile soils

  • Trees and perennials in vegetable garden for flowering plants, use 1-10 lb per planting hole, depending on plant size

  • Supplies phosphorus (P) and calcium (Ca) for up to 5 years after application, depending on the crop

Healthy soil provides the foundation for robust plant growth, increased crop yields, and the long-term vitality of agricultural ecosystems. Calphos Soft Rock Phosphate, a valuable soil amendment, plays a pivotal role in bolstering soil health and ensuring the success of organic farming practices.

Soft rock phosphate, a natural and slow-release fertilizer, is an invaluable resource for enriching garden soils. While it requires only a small amount to be effective, soft rock phosphate provides plants with an essential nutrient: phosphorus. This nutrient is crucial for plant growth and development, playing a key role in processes such as photosynthesis, energy transfer, and the formation of cell walls.

Before application, it's advisable to conduct a soil sample to determine phosphorus levels and ensure proper dosage. By incorporating soft rock phosphate into garden soils, gardeners can improve soil fertility and support healthy plant growth in a sustainable and eco-friendly manner.

Understanding Calphos Soft Rock Phosphate:

Calphos Soft Rock Phosphate, derived from natural geological deposits, is a finely ground powder rich in essential plant nutrients, primarily phosphorus. Unlike synthetic fertilizers, which can harm the environment and disrupt the delicate balance of soil microbiota, soft rock phosphate is a natural and eco-friendly source of nutrients.

The Benefits of Calphos Soft Rock Phosphate in Agriculture:

  1. Phosphorus Enrichment: Phosphorus is a vital nutrient for plant growth and development. It plays a central role in processes such as photosynthesis, energy transfer, and root formation. Calphos Soft Rock Phosphate supplies a steady and long-lasting source of phosphorus to the soil, enhancing the nutrient profile necessary for healthy crop growth.

  2. Sustainable Nutrient Release: One of the key advantages of Calphos Soft Rock Phosphate is its slow-release properties. Unlike water-soluble synthetic fertilizers that can lead to nutrient leaching and environmental pollution, soft rock phosphate gradually releases phosphorus into the soil, matching plant demand and minimizing nutrient runoff.

  3. Enhanced Root Development: Adequate phosphorus levels are essential for robust root development. Calphos Soft Rock Phosphate promotes the growth of strong and healthy root systems, enabling plants to access water and nutrients more effectively. This, in turn, enhances their overall resilience and ability to withstand environmental stressors.

  4. pH Adjustment: Soft rock phosphate also serves as a pH regulator in the soil. It helps balance soil pH levels, making them more conducive to nutrient uptake by plants. This adjustment is particularly valuable in soils that tend to be acidic, as it creates a more favorable environment for plant growth.

  5. Beneficial Microbial Activity: Healthy soil teems with beneficial microorganisms that contribute to nutrient cycling and overall soil fertility. Calphos Soft Rock Phosphate supports the proliferation of these vital microorganisms, fostering a dynamic and thriving soil ecosystem.

How to Use Calphos Soft Rock Phosphate:

The application of Calphos Soft Rock Phosphate in agriculture is straightforward:

  1. Soil Preparation: Before planting, incorporate the soft rock phosphate powder into the soil. The recommended application rate may vary depending on soil test results and specific crop requirements. Typically, it is advisable to apply between 100 to 400 pounds per acre.

  2. Mixing: Calphos Soft Rock Phosphate can be blended with other organic soil amendments, such as compost or well-rotted manure, for a comprehensive and balanced soil enrichment strategy.

  3. Incorporation: Work the soft rock phosphate into the top few inches of soil using traditional farming practices like tilling or plowing. This ensures even distribution and accessibility to plant roots.

  4. Crop-Specific Timing: For best results, apply Calphos Soft Rock Phosphate in advance of planting or during the early stages of crop development. This allows sufficient time for the slow-release nutrients to become available to the plants as they grow.

  5. Regular Testing: Soil testing is a valuable practice for monitoring nutrient levels and ensuring that phosphorus remains within optimal ranges. Adjust the application rate based on soil test recommendations.

Calphos Soft Rock Phosphate stands as a natural and sustainable solution for enhancing soil health in agriculture. Its slow-release phosphorus content, pH-adjusting capabilities, and support for beneficial microbial activity make it a valuable asset for organic and sustainable farming practices. By incorporating Calphos Soft Rock Phosphate into their agricultural routines, growers can foster healthier soil, improve crop yields, and contribute to the long-term sustainability of their farming operations while minimizing environmental impact.

Any other fertilizing needs can be mitigated by checking out our other fertilizers and growing supplies.

Shipping Information

Ships from Northern CA.

Does not qualify for Flat Rate Shipping.

Shipping Weight: 51.0 lb

Dimensions: 20.0"L x 13.0"W x 4.0"H

Features

    Characteristics

    Organic Status: Approved for Use in Certified Organic Agriculture
    Animal-Based : No
    Fertilizer Type : Powdered/Granulated/Meal
    Major Nutrients : Calcium
    Major Nutrients : Over 3% Phosphorus
    Major Nutrients : Trace Minerals
    Nutrient Release Rate : Long-term (4+ Months)
    Use as Foliar : No
    Organic Certifier: OMRI, CDFA

    Use Instructions

    Useful Information

    Guarantee

    View full details

    Customer Reviews

    Based on 18 reviews
    83%
    (15)
    17%
    (3)
    0%
    (0)
    0%
    (0)
    0%
    (0)
    P
    Penelope
    Love it

    Tried and True amendment. Standard Go to each year.

    K
    Kim
    Great product!

    All I can say is these amendments are absolutely worth the money! My plants are thriving! The customer service and shipping are also impeccable! Highly recommend!

    D
    Debbie D.
    Essential garden supplement

    I’ve been using this supplement for many years in my foothill garden soil. It breaks down quickly and provides the best source of phosphorus for my fruiting vegetable plants that I have found. It is an essential additive that I use annually prior to planting and has helped produce an abundance of garden vegetables.

    D
    Debbie Diianni
    Great amendment and affordable.

    Excellent amendment for my foothill clay soil. Makes the difference for a good fruit set. I add it to my garden soil annually prior to planting in the spring.

    R
    Rebecca Morrill
    A basic

    Good basic soil amendment for all plants And relatively inexpensive

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