SKU: 44720152515
calcium phosphate fertilizer for plants

calcium phosphate fertilizer for plants Calphos Soft Rock Phosphate (5 lb bag)

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Description

calcium phosphate fertilizer for plants Calphos Soft Rock Phosphate (5 lb bag)Enhance soil fertility and promote strong root development with Calphos Soft Rock Phosphate (5 lb), a natural source of phosphorus and calcium. This slow release mineral fertilizer provides essential nutrients that support plant growth, improve flowering, and encourage fruit and vegetable production. Ideal for organic gardening, it gradually breaks down in the soil, supplying a long lasting source of phosphorus without the risk of leaching. Phosphorus

Enhance soil fertility and promote strong root development with Calphos Soft Rock Phosphate (5 lb), a natural source of phosphorus and calcium. This slow-release mineral fertilizer provides essential nutrients that support plant growth, improve flowering, and encourage fruit and vegetable production. Ideal for organic gardening, it gradually breaks down in the soil, supplying a long-lasting source of phosphorus without the risk of leaching.

Phosphorus is a key nutrient for root establishment, energy transfer, and bloom development, making Calphos an excellent choice for root vegetables, fruiting plants, and flowering ornamentals. In addition to phosphorus, this soft rock phosphate contains calcium, which strengthens plant cell walls and contributes to overall plant resilience. Together, these nutrients support vigorous plant growth and improved yields.

Easy to apply, Calphos Soft Rock Phosphate can be mixed into the soil before planting or used as a top dressing to provide continuous nourishment throughout the growing season. It is suitable for vegetable gardens, orchards, flower beds, and general soil improvement. The finely ground powder ensures efficient nutrient absorption, helping plants thrive in a variety of growing conditions.

Key Benefits:

  • Rich Nutrient Content: Averages 20% P2O5 (3% immediately available), 18% calcium.
  • Slow-Release Formula: Provides phosphorus and calcium for up to 5 years after application.
  • Supports Root Growth: Strengthens root systems and improves plant resilience.
  • Improves Soil Microbial Activity: Enhances beneficial bacteria for better soil health.
  • Reduces Nutrient Loss: Stays in the soil, minimizing runoff and maximizing plant uptake.
  • Versatile Application: Ideal for vegetables, trees, perennials, and general soil enrichment.

Application Guidelines:

  • General Use: Apply 5 lbs per 100 square feet or 1 ton per acre on phosphorus-deficient soils.
  • Trees & Perennials: Use 1-10 lbs per planting hole, depending on plant size.
  • Pre-Planting: Mix into the soil for best nutrient absorption.
  • Top-Dressing: Apply around plants as a slow-release nutrient source.

For larger applications, Calphos Soft Rock Phosphate is also available in a 50 lb bag.

Learn More About Soft Rock Phosphate:

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SKU: 44720152515

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Whitney
Lowell, US
★★★★★ 5
Great shelf
Color: 1set, Size: 32inch, Color: 1set, Size: 32inch
Looked great in home office. Easy to assemble and not too difficult to install. Hardest part was measuring and getting two shelf sets to align properly on the wall but would have been super easy with just one. Will need a drill for the anchors.
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Reviewed in the United States on May 30, 2026
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David Hester
Battle Creek, US
★★★★★ 5
Quality
Color: 1set, Size: 24inch
Very easy to assemble and mount very stable and good looking 100% recommend
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Reviewed in the United States on May 18, 2026
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Amazon Customer
Battle Creek, US
★★★★★ 5
Sturdy and great looking
Color: 1set, Size: 24inch
Easy to build, looks good, sturdy. Good quality
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Reviewed in the United States on January 30, 2026
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LauraE
Birmingham, US
★★★★★ 5
Gorgeous shelf
Color: 1set, Size: 16inch, Color: 1set, Size: 16inch
Gorgeous shelf! I know it’s not real wood but you can’t tell the difference and the price is right! Pipes are beautiful too! My dad put this up and had a little trouble aligning it up with the holes so make sure you have um right before you start drilling them.
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Reviewed in the United States on March 27, 2026
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KCL
Belleville, US
★★★★★ 4
Not REAL wood - particle board with veneer - but still beautiful.
Color: 1set, Size: 24inch, Color: 1set, Size: 24inch
Came on time, easy to assemble, relatively easy to install. Metal rods are actually metal, which is nice. Flanges are good quality, very nice rustic look. Shelves are less wonderful. They are definitely not real wood at all. They are cheap particle board with veneer. I would not have purchased had I read more reviews, BUT it is still beautiful, sturdy and does the trick. We can always cut our own shelves if we should so choose and re-use the very nice hardware. 4/5 for misrepresenting as real wood, but 5/5 for functionality and aesthetic.
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Reviewed in the United States on February 26, 2023

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