PetraMax liquid fertilizer for grass is made for homeowners & lawn pros who want reliable, visible results without complicated application steps. The concentrated liquid formula works with any standard pump sprayer. Whether you are correcting visible nutrient deficiency or maintaining healthy growth through the season, the right dilution rate is all it takes to get started. Here is what you get:

NPK Ratio (16-4-8)

16% Nitrogen, 4% Phosphate, 8% Potash

Derived From

Urea, Urea Triazone, Potassium Hydroxide, Potassium Carbonate, Phosphoric Acid

Nitrogen Release

Quick-release + Slow-release (dual-action formula)

Coverage (1 Gal Bottle)

Up to 25,600 sq ft (maintenance rate)

Application Method

Pump sprayer or battery-powered sprayer

Most lawns that look thin, pale, or patchy are not getting the full range of nutrients they actually need. PetraMax lawn fertilizer max 16-4-8 fixes that with a balanced liquid formula that covers color, root strength, and soil health in one bottle. The 2-in-1 nitrogen blend is what makes it different from standard fertilizers. You get quick color improvement within days, plus steady feeding that keeps your lawn looking full and consistent between applications instead of fading out too fast. Stronger root support helps new or struggling grass establish better, while added nutrient support helps your lawn handle heat, dry weather, and seasonal stress. For regular maintenance, mix 5 oz per gallon of water. For stressed, pale, or nitrogen-deficient lawns, use 10 oz per gallon. Apply 1 gallon of mixed solution per 1,000 sq ft, spray during cooler hours before 10:00 AM or after 5:00 PM, then water the lawn for about 20 minutes after application. Reapply monthly as needed, with at least 14 days between applications.

Store only in the original, tightly sealed container. Protect from frost and extreme temperatures. Do not dispose of unused product with household waste. Prevent entry into storm drains or sewage systems. Absorb spills with inert materials such as sand or earth.

Petramax Lawn Fertilizer Max

$78.99

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PetraMax 16-4-8 Liquid Fertilizer delivers rapid green-up, deep root strength, and season-long lawn vigor in one balanced formula.

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NPK Ratio (16-4-8)

16% Nitrogen, 4% Phosphate, 8% Potash

Derived From

Urea, Urea Triazone, Potassium Hydroxide, Potassium Carbonate, Phosphoric Acid

Nitrogen Release

Quick-release + Slow-release (dual-action formula)

Coverage (1 Gal Bottle)

Up to 25,600 sq ft (maintenance rate)

Application Method

Pump sprayer or battery-powered sprayer

Frequently Asked Questions

What exactly does 16-4-8 mean, and is this a balanced fertilizer?

Yes. 16-4-8 means this fertilizer contains 16% nitrogen, 4% phosphorus, and 8% potassium. Of that nitrogen, 70% is quick release and 30% is slow release, so your lawn gets both fast feeding and continued support between applications. This balanced liquid fertilizer for plants helps support greener color, stronger roots, and overall lawn health.

Is this the right fertilizer for my lawn, or do I need something stronger like 28-0-0?

PetraMax 16-4-8 is a great choice if your lawn needs complete feeding, not just more nitrogen. It helps improve color, root strength, and stress support, while stronger high-nitrogen formulas are usually more focused on quick greening.

Will this work on my grass type?

Yes. PetraMax 16-4-8 is safe for all grass types, including both warm-season and cool-season lawns. It can be used on common varieties like Bermuda, Bahia, Buffalo, Centipede, Fescue, and Kentucky Bluegrass

How fast will I actually see results?

Many lawns show visible green-up within just a few days when applied during active growing conditions. The quick-release nitrogen works fast, while the slow-release portion keeps feeding your lawn between applications for longer-lasting results.

How often should I apply it?

Our liquid fertilizer for lawns can be reapplied every 2 to 4 weeks during the growing season, depending on your lawn’s needs. Always allow at least 14 days between applications for best results.

Can this burn my lawn?

When used as directed, PetraMax 16-4-8 is designed to feed your lawn without overloading it. To help avoid burn, follow the mixing instructions carefully and do not apply during extreme heat or stressful conditions.

Is it safe for pets and kids, and when can they go back on the lawn?

Yes. This spray lawn fertilizer is pet friendly when used as directed. Children and pets can safely return to the lawn once the treated area has completely dried after application.

Should I use this in spring, summer, fall, or during heat?

For best results, apply PetraMax 16-4-8 when your lawn is actively growing, usually in spring and summer. Apply during cooler hours before 10:00 AM or after 5:00 PM, and then water the lawn to help the nutrients soak in.

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Petramax Lawn Fertilizer Max