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The Best Way to Fertilize and Water Your Lawn for Greener Grass, According to Pros

By José R. Mendoza Men's Journal

Updated April 29, 2026 8:22 PM

Maintaining a green, lush lawn requires proper practices, such as mowing, watering, aerating, and fertilizing at the right time. The key to keeping your grass green throughout the spring, summer, and fall is to address any issues first, such as unhealthy soil and patchy, yellow, or dull grass.

Want a healthy, thick lawn? You're in luck. Here's what you need to do to make your lawn green, according to experts.

Why Your Lawn Isn't Green

The first step to having a green lawn is to figure out why your grass isn't green. There are many reasons for unhealthy grass, including a lack of essential nutrients such as nitrogen, phosphorus, potassium, and iron, which can cause yellow or brown grass. Other factors that affect the health of your lawn include:

Poor watering habits. Most grass types only need about one inch of water weekly. Overwatering or underwatering your lawn can compromise its health.
Compacted soil. This prevents your grass from getting the nutrients it needs to stay healthy and green.
Mowing your grass with dull mower blades. Yes, these will cut your grass, but they'll also put stress on it, making it more susceptible to diseases and potentially turning the tips of your grass brown.

10 Best Ways to Make Your Lawn Greener

Looking for a way to boost your lawn care game and turn that brown and yellow grass into a nice-looking lawn? Brian Feldman, senior director of technical operations at TruGreen, shares this advice: "To keep your grass green and healthy, the most important work begins in spring, when your lawn is actively recovering from winter stress and preparing for peak growth."

Here we've listed the best ways to do it.

1. Use the Right Fertilizer

Before you choose a fertilizer for your lawn, you need to understand your soil's health. Perform a soil test and see what nutrients your lawn is lacking. Once you have determined what your grass needs, you can buy the right fertilizer with confidence.

When choosing your fertilizers, pay attention to the nitrogen (N), phosphorus (P), and potassium (K) ratio, often labeled as NPK. Then choose between slow-release and gradual-release. Slow-release fertilizer feeds your grass slowly over several months. On the other hand, gradual-release "allows plant roots to harvest the nutrients they need even more slowly. This type is easy to apply and minimizes the chance of burning the lawn," explains Feldman.

Timing is key to fertilizing and it should be done when the grass is in its growing phase. Cool-season grasses benefit from early spring or early fall application, whereas warm‑season grasses should be fertilized between late spring and early summer.

Lastly, fertilizers come in granular and liquid formulas. Both are easy to apply; just make sure to follow the manufacturer's instructions.

2. Add Iron for a Deeper Green Color

Iron deficiency is most common in younger grass clips; yellow or whitish leaves may be present. The best way to tackle iron deficiency is to first determine whether the grass lacks iron. A soil test should do the work. A foliar or liquid solution is considered the most effective way to deliver iron to the soil. Adding iron to your lawn will boost its color and appearance.

3. Water Deeply (Not Daily)

Your lawn only needs about one inch of water every week. That's sufficient to keep your grass hydrated throughout the week. Always aim to water deeply only once a week so the roots stay moist and build strength and resilience.

The best time to water your grass is in the morning before the heat of the day. Watering your grass later in the day can lead to evaporation and your grass not getting enough water.

4. Mow Properly (Follow the 1/3 Rule)

Mowing your grass properly goes beyond giving your lawn a nice, neat look; it also helps your grass grow stronger and greener. Experts recommend following the 1/3 rule, which means cutting only about 1/3 of the grass blades at a time.

5. Sharpen Your Mower Blades

Your mower blades should be sharpened at least twice during the mowing season, at the start and in the middle of the season. Dull blades stress your grass, turning the tips brown. Having sharp blades will make your work more efficient and your grass healthier and greener.

6. Aerate Compacted Soil

One of the most effective lawn care practices for a green lawn is aeration. Feldman explains that "core aeration is beneficial for compacted or clay-heavy soils since it opens pathways for air, water, and nutrients to reach the roots." To get the most out of aeration, you can fertilize your lawn after aerating it. The best time to aerate your lawn depends on whether you have cool- or warm-season grass. Spring is the ideal time to aerate warm-season grasses, and early to mid-fall is the best time for cool-season grasses.

7. Dethatch Your Lawn

Over time, thatch-a layer of debris, dead grass, and soil-creates a buildup that prevents the grass from getting nutrients to grow healthy. If your lawn feels spongy or has a thatch buildup over an inch, dethatching could be beneficial. However, some experts recommend core aeration before actually detaching your lawn.

8. Control Weeds and Moss

Weeds are a grass killer and making sure you have them under control will ensure that your grass is actually getting all the nutrients it needs and not fighting with weeds. Applying a pre-emergent weed treatment early in the spring is a good way to get ahead of the game. Only do this when the grass is actively growing. Otherwise, it may cause more harm than good and stress out your lawn. Also, if you spot weeds growing in other areas, you can target them and pull them by the roots.

9. Increase Sunlight Exposure

Most grass types thrive in the sun and the more sun they get, the better. Unless your grass is shade-tolerant, make sure your lawn is exposed to sunlight as much as possible. Trim any branches or large shrubs that create a canopy over your grass, preventing it from growing green and healthy. If your property receives little sunlight, consider a shade-tolerant grass such as St. Augustine or fine fescue.

10. Overseed Thin or Patchy Areas

Overseeding and addressing patchy areas in your lawn will help your grass get healthy and green. Overseeding is more effective when done along with core aeration. Once you have spread the seed, ensure that you water the seeds until they are moist, and continue to keep the grass moist until it is established.

Best Lawn Care Schedule for Green Grass

Lawn care is seasonal. Here's a lawn care schedule to follow to keep your grass green.

Spring

The spring is the best time to start addressing weeds, get your grass ready for the warm season, and give it a little boost to grow green and strong.

Spring Clean-up

Start by clearing any fallen branches, twigs, and other debris that have accumulated on your lawn during the winter.

Fertilize

The best time to fertilize your lawn is in the fall. However, if you missed that window, you can start by applying a fast-release fertilizer to boost your lawn quickly as it starts growing. This normally happens when temperatures reach over 45 degrees.

Pre-emergent Application

Weeds start popping up as soon as the weather warms; that's why it is important to get ahead of the game. Applying a pre-emergent weed treatment will help you manage weeds better and set your grass up for success.

Mowing

Grass grows best and strongest when mowed at a height setting. The actual height will depend on the type of grass you have. If unsure, never mow more than 1/3 of the grass height.

Summer

Mowing

In the summer, cool-weather grasses grow more slowly, but you should continue to mow your grass at the same height as in the spring and ensure you're not scalping it and putting stress on it.

Watering

Most grasses benefit from getting one inch of water per week. Try to water your grass deeply once a week, preferably before the heat of the day.

Pest management

Early summer is the time for pests that thrive in grass to start showing up, such as grubs (beetle larvae). It is best to address them before they hatch.

Fall

Fall is one of the most important seasons to care for your lawn and the following three items should be done:

Core Aeration

Core aeration helps with compacted soil, making it easier for nutrients, water, sunlight, and fertilizer to reach the grass roots.

Fertilize

Fall is the optimal time to fertilize your lawn, as it helps repair the stress of summer and gets your grass ready for winter.

Overseed

After core aeration, you should overseed your grass to help it establish before winter and start strong in the spring.

Winter

The good news is that in the winter, most grass types go dormant, and there's not really much that needs to be done to care for your lawn.

Common Mistakes That Prevent a Green Lawn

Following the right lawn care schedule is essential for a green lawn on your property. Avoid these mistakes:

Overwatering or underwatering. Grass only needs about one inch of water a week. No more, no less. Don't water every day; instead, only once a week and deeply.
Cutting grass too short. Grass is best mowed at a high setting. Cutting the grass too short stresses the lawn.
Skipping soil testing before you start adding extra nutrients to your lawn. Understanding the health of your soil, and seeing what nutrients are lacking will help you prevent overfertilizing and adjust the pH for your soil correctly.

FAQs

How do I make my lawn greener quickly?

You can make your grass greener by properly fertilizing, watering, and mowing it. First, test your soil and get a fertilizer based on your findings. Then, water your grass once a week, deeply. Aim for one inch per watering session. Next, mow your grass tall once a week, cutting no more than one-third of its height.

What fertilizer makes grass the greenest?

An iron-based fertilizer helps your grass develop a deep green color. Before you apply any fertilizer to your grass, experts advise conducting a soil test to understand your soil's health and what your grass needs to thrive.

How often should I water my lawn?

You should water your lawn once a week and deeply. Experts recommend watering your grass one inch a week. It is best to water your grass in one go, rather than every day.

Will watering dead grass make it green again?

No. If your grass is dead, meaning it isn't growing anymore, it doesn't matter how much water you apply; it won't grow again. It is best to start over and lay new grass seed.

Is iron or nitrogen better for green grass?

Iron helps give your grass that extra green color. However, it is important that you only apply iron to your lawn when it has an iron deficiency. On the other hand, nitrogen stimulates root development and growth, which can lead to greener grass. However, before you attempt to apply either one, a soil test is recommended.

This story was originally published by Men's Journal on Apr 30, 2026, where it first appeared in the Home Living section. Add Men's Journal as a Preferred Source by clicking here.

This story was originally published April 29, 2026 at 7:08 PM.