SKU: 92966732208

Calphos Soft Rock Phosphate (25 lb bag)

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Description

Calphos Soft Rock Phosphate (25 lb bag)Boost soil fertility and support strong root development with Calphos Soft Rock Phosphate, a natural source of phosphorus and calcium. This finely ground mineral powder provides essential nutrients that promote vigorous plant growth, improve flowering, and enhance fruit and vegetable production. Ideal for natural gardening, Calphos releases nutrients slowly over time, ensuring long term benefits for soil health. Phosphorus plays a crucial role in

Boost soil fertility and support strong root development with Calphos Soft Rock Phosphate, a natural source of phosphorus and calcium. This finely ground mineral powder provides essential nutrients that promote vigorous plant growth, improve flowering, and enhance fruit and vegetable production. Ideal for natural gardening, Calphos releases nutrients slowly over time, ensuring long-term benefits for soil health.

Phosphorus plays a crucial role in energy transfer, root establishment, and bloom formation, while calcium strengthens cell walls and improves overall plant resilience. For a deeper understanding of phosphorus's impact on plant health, you might find our article on How to Use Fertilizers—Soft Rock Phosphate insightful.

Calphos Soft Rock Phosphate can be applied before planting or used as a top dressing throughout the growing season. For specific guidance on phosphorus application for bulbous plants, refer to our blog post What Phosphorus is Right For Your Bulbs?

Key Benefits:

  • Averages 20% P2O5 (3% immediately available), 18% Calcium
  • 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 gardens 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
  • Provides calcium for strong cell structure and plant resilience
  • Improves soil microbial activity and reduces nutrient loss

Improve soil structure and encourage abundant plant growth with Calphos Soft Rock Phosphate. This natural mineral fertilizer provides essential nutrients that help plants establish deep roots, produce vibrant blooms, and yield high-quality fruits and vegetables.

Learn More About Soil Health and Fertilization:

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Exchange/Return Notes
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SKU: 92966732208

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4.1 ★★★★★
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Cliente de Kindle
Lexington, US
★★★★★ 5
Buen hidratante
Buen producto y muy funcional para actividades deportivas
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
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DrAngel
Massapequa, US
★★★★★ 3
Weird taste...and no fizz....
I presume these do what they are meant to do...replenish electrolytes (although how completely you need replenishing, meaning needing other minerals besides what are in these Idk) However, the whole reason I would not repurchase is the taste is ...OFF. For some its not that strong, but for me its TOO strong, I want a subtler lemon lime taste (or any other flavor) basically a sugarless Sprite taste. And if you're looking for fizz to truly make it a flavored seltzer water experience, Nope.
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Reviewed in the United States on March 15, 2026
M
Verified Purchase
Mr Chet
Fort Morgan, US
★★★★★ 5
Tastes good
They have a good taste and I like the fizzy part.
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Reviewed in the United States on February 19, 2026
E
Verified Purchase
Esperanza Delgado
Belleville, US
★★★★★ 4
Taste good!
Taste good!
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Reviewed in the United States on January 15, 2026
R
Verified Purchase
Rochelle Walker
Boise, US
★★★★★ 5
Awesome product!
MicroIngredients has done it again! While they don't taste great, they are tolerable. I'm confident this will help replenish any nutrients I may be missing.
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Reviewed in the United States on December 30, 2025

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