Ultimate 3-18-18 Lawn Food Liquid Fertilizer - Root Vigor Booster

Our review of the Ultimate 3-18-18 Lawn Food finds it best suited for homeowners who need to improve turf root strength and correct phosphorus or potassium deficiencies. This concentrated liquid fertilizer stands out because it delivers high levels of phosphorus and potassium in a quick-release form, so lawns - especially newly sodded or seeded areas - receive nutrients that support root development and stress endurance without excessive top growth. It is an easy-to-apply option for anyone who prefers liquid feed over granular products and wants fast nutrient uptake.

Key Features

• High Phosphorus: Contains 18% phosphorus to encourage strong root vigor, which is important when establishing turf from sod or seed.
• High Potassium: With 18% potassium, the formula supports carbohydrate formation and enzyme activation to help the lawn endure stress.
• Low Nitrogen: The 3% nitrogen content limits excessive top growth while still supporting general turf coloration and density.
• Quick-Release Liquid Nutrients: Liquid feed acts fast so nutrients begin to be available to roots sooner than many slow-release granules.
• Wide Grass Compatibility: Safe for both warm and cool season grasses including Bermuda, Zoysia, St. Augustine and bluegrass, so one bottle covers mixed lawns.
• Generous Coverage: One gallon covers up to 12,800 sq ft when used with a hose-end sprayer, making it practical for medium to large yards.

Who It's For

This product is ideal for homeowners and small property managers who are addressing visible or suspected phosphorus and potassium deficiencies or establishing new turf with seed or sod. It is also a good fit for those who prefer a liquid application and want a product manufactured in the USA with feed-grade ingredients.

It is less appropriate for users seeking a high-nitrogen, fast-green-up feed for frequent mowing cycles, or for those who need a slow-release, long duration granular program; those users should look for a higher nitrogen or slow-release granular option instead.

Pros & Cons

Pros

• High phosphorus and potassium specifically formulated to support root establishment and plant functions.
• Liquid, quick-release formula that customers report showing visible improvements in greenness and growth within days in some cases.
• Covers a large area with a single gallon when used with a hose-end sprayer, and works on most grass types.
• Manufactured in the USA by a company with turf industry experience, using feed-grade ingredients.

Cons

• Low nitrogen means it will not produce rapid top-growth or thickening the way a high-nitrogen fertilizer will.
• Some users find the perceived value mixed depending on expectations for speed of visible change and application method.

Specifications

Product type	Liquid lawn fertilizer
NPK	3-18-18
Coverage	Up to 12,800 sq ft (hose-end sprayer)
Grass types	Warm and cool season grasses (Bermuda, Zoysia, St. Augustine, bluegrass, etc.)
Formulation	Quick-release liquid, feed-grade ingredients
Made in	United States

Our Verdict

The Ultimate 3-18-18 Lawn Food is a practical choice for anyone focused on improving root vigor, establishing new turf, or correcting phosphorus and potassium deficiencies without stimulating excessive top growth. Its liquid, quick-release format and wide grass compatibility give good value for yards that need targeted nutrient support rather than heavy nitrogen feeding.

Frequently Asked Questions

Can this be used on all grass types?
Yes, it is suitable for both warm season and cool season grasses including Bermuda, Zoysia, St. Augustine and bluegrass.

How much area does one gallon treat?
One gallon covers up to 12,800 sq ft when applied with a hose-end sprayer; coverage will vary with other sprayer types.

Is this product fast-acting?
Yes, as a quick-release liquid it becomes available to roots faster than most granular fertilizers, and some users report visible changes within days.