Grow Organic
Calphos Soft Rock Phosphate for Fertile Soil
Calphos Soft Rock Phosphate for Fertile Soil
Calphos Soft Rock Phosphate is a natural source of phosphorus and calcium that boosts soil fertility and supports strong root development. This finely ground mineral powder provides essential nutrients to promote vigorous plant growth, improve flowering, and enhance fruit and vegetable production. Ideal for natural gardening, Calphos releases nutrients slowly over time, offering long-term benefits for soil health.
Phosphorus supports energy transfer, root establishment, and bloom formation, while calcium strengthens cell walls and increases plant resilience. The product can be applied before planting or used as a top dressing during the growing season. It averages 20% P2O5 (3% immediately available) and 18% calcium, with recommended use of 5 lb per 100 square feet or 1 ton per acre on phosphate-deficient soils. For trees and perennials in vegetable gardens, apply 1–10 lb per planting hole, depending on plant size. It can provide phosphorus and calcium for up to five years after application, depending on the crop, and it improves soil microbial activity while reducing nutrient loss.
📋 Product summary:
- Averages 20% P2O5 (3% immediately available) and 18% calcium
- Slow-release formula supports long-term soil health
- Apply before planting or as a top dressing; 5 lb/100 sq ft or 1 ton/acre
- For trees and perennials, 1–10 lb per planting hole; provides P and Ca for up to five years
Couldn't load pickup availability
📦 Nationwide shipping & returns
📦 Nationwide shipping & returns
NATIONWIDE SHIPPING:
Some free shipping products may be limited to the lower 48 states, as indicated by our shipping estimator tools and checkout cart. Outdoor living, home, and garden items ship nationwide. Standard shipping fees are confirmed at checkout based on your address and provider selection. Free shipping items incur zero fees at checkout. Tracking details are emailed instantly upon order fulfillment.
NATIONWIDE SHIPPING RETURNS: 30 day returns.
We accept returns of unused products that are defective or not defective. Your return must be processed within 30 days of the date of purchase. We do not process exchanges. We will provide a shipping label by email, you are responsible for bringing the return to the shipping provider.
FREIGHT PRODUCT RETURNS: no returns or exchanges.
There are no returns, exchanges or refunds for products delivered via freight. REFUNDS: The cost of the return shipping and a 6% credit card processing/restocking fee will be deducted from your refund amount. The refund balance will be distributed to you once the returned product is received and processed.
NATIONWIDE PRODUCT REFUNDS:
The cost of the return shipping and a 6% credit card processing/restocking fee will be deducted from your refund amount. The refund balance will be distributed to you once the order is canceled and the returned product is received and processed.
Let customers speak for us
Really nice soil and awesome service
Never used because I ordered the wrong Water Filter. Mike was very helpful with the return and refund. Excellent Customer Service.
Great service. Soil is what I wanted and it off loaded exactly where I asked.
Plants are doing really well with this soil. Deep and rich looking soil, plants seem really happy. Much more cost effective (and no plastic bag waste) compared to buying bags of soil mix from a store.
The quality of the craftsmanship is superb! My formula one fan absolutely loves it!!!!
Worked like an absolute charm!
These markers were perfect for ones that we were replacing. The quality is great and they seem sturdy. The gold detail stands out and is visible from a distance. Shipping was very fast.
Good solution. The little flies have disappeared. We were sure to mist/moisten the surface of each plant once a day for 4 or 5 days, after the initial application of the nematodes, to keep the little guys mobile and able to get to any remaining eggs. So, go for it!
Plant was well packed and shipment was very fast. Received a very nice fully rooted plant in the pot!
The organic garden soil is doing very well in my garden bed. The company was professional, nice, and accommodating to my needs. They provide many types of things for your landscaping at a reasonable price.
Product was delivered promptly and the quality of the product was very good, as hoped for. I was thrilled to receive the product so quickly! Thank you!
Product is great. Didn't care for having to pay am extra $17 tariff to UPS to get it delivered, but I guess that's not your doing. Thank you Mr. President.
