The Andersons Home and Garden | SmartPhos DG®

SmartPhos DG® 4-22-0

Lawn Fertilizer

  • SmartPhos DG® 4-22-0 is a professional-grade high phosphorus fertilizer derived from struvite, an innovative phosphorus source
  • Made with patented SmartPhos® technology which allows for balanced, slow-release nutrition
  • Highly plant-available, offering nutrients that can be readily absorbed
  • Phosphorus will not leach or tie-up in soil
  • Not impacted by soil pH issues
  • Ideal fertilizer for use on newly planted lawns and mature lawns with low phosphorus levels
  • Recommended to use ahead of nutrient blackout periods
  • Extremely small particle size for double the coverage
  • Made with patented DG Technology
  • Made in the USA
  • SmartPhos® DG is available in pallet quantities - there are 77 18lb. bags on a pallet


The Andersons SmartPhos DG® 4-22-0 is a professional-grade all slow-release fertilizer designed to provide a season-long feeding of highly plant-available phosphorus. Unlike traditional phosphorus products, SmartPhos is made with struvite and utilizes our patented technology. The result is a formula that offers low water solubility, allowing for a slow, steady supply of nutrients over an extended period of time without losing plant availability. This ensures the nutrients released over time are able to be used by the plant. SmartPhos will remain stable, eliminating the risk of nutrients being leached or tied-up in the soil.

SmartPhos DG 4-22-0 is made with an extremely small particle and includes The Andersons patented DG Technology. Upon contact with water, each granule disperses into thousands of microparticles that quickly move through the turf canopy into the root zone for superior coverage and enhanced efficacy.

This product is ideal for newly planted lawns. It has a low salt index so it won't burn new seedlings and can be used at half the rate of traditional starter fertilizers while delivering the same results. SmartPhos DG 4-22-0 can also be used in mature lawns with low phosphorus levels. It is ideal to apply SmartPhos DG 4-22-0 ahead of nutrient blackout periods.

Analysis 4-22-0 + Magnesium
Package Sizes 18 lb
Coverage Up to 7,800 sqft

- Fill and adjust your spreader to the recommended rate using the spreader settings chart on the label.
- Apply at the LOW to HIGH during the growing season or for seeding. Use the LOW or MEDIUM RATE during midsummer. For bentgrass and poa annua, apply at the low rate if temperatures are 85˚F or above.
- Apply product to dry foliage. For even application, be sure to walk at a steady rate, slightly overlapping each pass.
- Sweep any product on driveways and sidewalks back onto your lawn. Return any unused material back into the original package.
- To help move the particles into soil, water in with a minimum of 0.2 inches immediately after application

- Mow before applying
- Reapply every 4-6 weeks when establishing a new lawn.
- For mature lawns with phosphorus deficiencies, apply once in the spring and once in the fall.
- Store left over product in a clean, dry place. Reseal opened bag by folding top down and securing.

4.6 - 7.0 lbs./1,000 sqft.

2.3 - 4.6 lbs./1,000 sqft.

The spreader settings for this product were established using standard equipment available from the spreader manufacturer at swath widths and speeds typically used within the industry. Many variables such as walking speed, terrain, particle size, density, and spreader condition can affect these settings. Spreader settings are intended as a guide and unit calibration should still be performed to ensure proper application rates. They are not intended to replace calibration. The Andersons recommends the use of broadcast spreader for its products.

Related Products

Related Content

SmartPhos Environmental


Leading the Industry in Phosphorus Innovation: SmartPhos DG® 4-22-0 Fertilizer

Phosphorus in traditional fertilizers has the potential to leach or tie-up in the soil. Learn how our patented SmartPhos® technology ensures a highly plant-available, slow-release phosphorus feeding.

Read Guide
Moss in Lawn


Dealing with Moss in Lawns: Causes, Prevention and Solutions

Moss can overrun grass, leading to thin, patchy lawns. In this blog post, we'll explore the causes of moss growth, strategies for prevention, and effective solutions for managing moss in lawns.

Read Guide
Woman Watering Lawn Grub Damage


Grub Treatments vs. Preventatives

By understanding the differences between grub treatments and preventatives, homeowners can effectively manage grub infestations and maintain a healthy, vibrant lawn.

Read Guide