Grow Organic
Calphos Soft Rock Phosphate (5 lb bag)
Calphos Soft Rock Phosphate (5 lb bag)
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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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Shipping & Returns
Shipping & Returns
SHIPPING:
Products marked with free shipping will be free shipping at checkout. Otherwise, bulk per cubic yard delivery fee per truck is the same amount whether the truck is at minimum or maximum capacity. You may want to know the following guidelines:
- One small truckload full capacity: 9yd soil, 9yd compost, 10yd mulch, 5yd fill, 7yd contractor mix.
- One large truckload maximum capacity: 20yd soil, 20yd compost, 20yd mulch, 18yd fill, 20yd contractor mix.
The best value is always a maximum truckload for your particular product.
We can mix loads in the small truck to bring two products at once with 8 to 9 cu yd maximum, depending on the products needed. You must contact us to request a quote in this circumstance.
If you order online we will contact you shortly after purchase to schedule your delivery day and time frame. We often can do same day deliveries with a small truck quantities, call 727-645-5289 or message us here to find out.
The small truck delivery is generally 1 to 3 work days notice M-S and the big truck delivery is generally 2 to 6 work days notice M-F. If you have a specific day and time in mind then it's best to make your purchase A.S.A.P in order
to help ensure the day and time you need is available.
The delivery fee is calculated during checkout based on product type (weight),
product quantity, size of truck(s) and number of truckloads needed.
If you prefer to communicate directly to a representative to get a quote, click here.
RETURNS:
There are no returns once the product is delivered. Most of our bulk garden supplies weigh 800 to 1600 lbs per cubic yard and require heavy trucks and equipment to move in bulk.
REFUNDS:
A refund can be processed if you cancel an order at least 2 hours before the start of your scheduled delivery day and time frame. There's no refund within 2 hours of your scheduled delivery day and time frame.
Dimensions
Dimensions
3'x3'x3' per cubic yard
27 cubic feet per cubic yard
Let customers speak for us
He delivered great organic topsoil the same day. Excellent subsurface for sod. Friendly and fast, very careful during delivery.
The mulch was great. No junk in it like the bagged stuff. AsS with all outdoor projects weather is a thing. They were understanding of delays and changes.. And when the day came for delivery, there was plenty of communication and showed up on time. Plus the price was right!
I am very happy with my soil purchase! Great company to do business with! I highly recommend!
It works well. I just wish it had some residual to it so I wouldn't have to spray every few weeks.
Good and high quality, best pants from a soil company ive ever bought.
If you want a quick turn around when ordering soil, this is your guy. If you want someone to dump soil where YOU want it, this is your guy. If you want someone to sell you good soil instead of sand and broken up pallets, this is your guy. It seems weird that a guy and his wife would be so excited about dirt, I know. But we were. It’s the beginning of a big transformation for our house. So we ordered this, I think on and Saturday and surprisingly he said he could deliver it on Monday! So Monday, we woke up and literally wished each other a happy dirt day. I went to work and sure enough, he showed up on time and dumped the dirt exactly where we were hoping. And when I got home I walked over and before I could get there, you could smell the organic material in the dirt. Our plants will love this. Excellent quality. Excellent transaction. Excellent service. Couldn’t be happier.
Happy with the soil and delivery was when expected, would use again
The soil was delivered on time and exceeded my expectations. Love this service 😻
look in your email you sent I replyed there :)
Great communication, good price & reasonable shipping time! Will do business again!
Mike is a great guy. Knows his stuff and delivered it quickly.
Soil was great. Worked wonderful in the garden. Lots of nutrients to be found. Delivery was easy and on time. Thanks for great service.
For over two years I've been a customer of Site-One. Month after month I'd place an order of lawn treatment as recommended by their lab according to soil sample results. Month after Month I'd be forgotten about because I'm just a guy with a lawn. (They are used to large orders, usually many pallets per customer). I've finally given up on Site-One and found you guys. Thanks for being there.
