Liquid fertilizers are the go-to choices for many lawn owners as they are easy to apply. Even beginners can apply them evenly in the lawn without much hassle. Secondly, they provide nutrients to the lawn immediately and deliver quick results.
They are great, but the question is, what is the best liquid lawn fertilizer, and how to choose one?
This is a comprehensive guide on the best liquid lawn fertilizers. We will explain the types of liquid fertilizers and the factors you need to consider while buying them. We will also share incredible liquid fertilizer products for your lawn to make it lush and green.
Types of Liquid Lawn Fertilizer
Liquid fertilizers can be classified into two broad categories.
Synthetic Fertilizers
Synthetic liquid fertilizers are chemical fertilizers made from lab-created minerals. They are concentrated mineral salts, and you have to dissolve them in water for application. They are the most common liquid fertilizers you find online and in stores.
They work through Foliar Feeding, which means nutrients are absorbed through stomata instead of roots. When you apply them to the grass, the stomata on the grass blades absorb them quickly.
Most of them are fast-acting fertilizers. Within 24-48 hours of application, you start seeing results. It’s because they have bypassed absorption through roots. You can opt for synthetic liquid fertilizers when you want to see instant results.
The problem with these fertilizers is that they create a massive spike of nutrients. Thus, the grass starts growing aggressively. But after a few weeks, this cycle ends, and the growth halts. If you don’t apply it at the right time, you might have a yellow lawn once the cycle ends.
Organic Fertilizers
Organic liquid fertilizers are the natural fertilizers made from composted poultry litter, Menhaden fish, kelp (seaweed), etc.
They have a different working mechanism. There is minimal or no foliar uptake as they rely on microbes to break down the nutrients. The soil microbes, such as bacteria and fungi, eat the organic matter and release nitrogen, phosphorus, and potassium as byproducts. Thus, they need time to act and show the results.
Keep in mind that you can apply these fertilizers when the soil microbes are active. If the temperature of the soil is below 50⁰F, the microbes are asleep, so they won’t process it.
Organic fertilizers provide a steady supply of nutrients for a long time. Which is the reason you won’t see a surge in growth. They also improve the soil’s Cation Exchange Capacity, allowing it to hold water and nutrients more effectively.
The best part is that these fertilizers are safe for children and pets. They are non-toxic, and kids and pets can enter the lawn after application. There is no irritation on the paws and skin upon contact.
These fertilizers are made from once-living sources, and that’s why they have a certain odor that you might not like. It stays for 24-48 hours, so you must be prepared before application.
How to Select the Best Liquid Lawn Fertilizer?
To select the right liquid fertilizer for your lawn, you must consider the following factors.
Purpose of Application
The most important thing is why you are fertilizing the lawn. It could be for regular maintenance, emergency greenery, new seed development, heat & drought protection, etc.
If your lawn has turned yellow, and you want to make it green quickly, you can go with a synthetic fast-release fertilizer. It will show quick results within 48 hours. It turns your yellow lawn green again without any hassle. Just make sure the fertilizer is high in nitrogen. If it has chelated iron, it would be better.
But if you want to feed your lawn for a long time and go with an eco-friendly option, you should go with an organic fertilizer.
If you have reseeded the lawn, your grass needs high phosphorus. You can also look for the Starter Liquid Fertilizer label. It supports root development and makes your new grass healthy.
Sometimes, your grass is suffering from heat and drought. In these cases, a high potassium fertilizer is quite effective. It strengthens the internal cell structure and makes it ready to bear harsh environmental conditions.
N-P-K Ratio
Nitrogen, Phosphorus, and Potassium (N-P-K) are three macronutrients in lawn fertilizers. They are essential in different developmental stages of grass.
While choosing a fertilizer, you have to look at the N-P-K ratio. It gives you an idea of the macronutrients in the fertilizer.
For selecting the right N-P-K ratio, you should do lawn soil testing in the first place. Collect a soil sample from the lawn and submit it to a lab. Its detailed report will show the exact levels of the nutrients and what kind of fertilizer you should apply.
You have to pick a suitable N-P-K ratio according to the type of grass and the time of the year. For instance, in the spring season, a high nitrogen fertilizer (such as 15-0-0) is recommended for cool-season grasses. It helps in the aggressive growth of grass. Before winter, you should aim for fertilizer high in potassium. For more details, check out the lawn fertilizer schedule.
Check for Extra Ingredients
Fertilizers also contain some extra ingredients, such as iron, zinc, pesticides, and herbicides. You must look at these extra ingredients before buying.
Iron is extremely common in many fertilizers. It helps the lawn become green quickly, without boosting growth. Magnesium is the building block of the chlorophyll molecule, which is essential for photosynthesis. Zinc helps in regulating plant growth hormones and enzyme systems.
Some liquid fertilizers also contain humic acid. It’s not a fertilizer; instead, it is an organic soil conditioner that improves nutrient uptake, boosts root growth, and enhances soil structure. It makes the N-P-K available to the roots. It also feeds beneficial soil microbes to create a healthy ecosystem.
You will also notice seaweed and kelp extracts in lawn fertilizers. They work like a stress reliever and help plants bear difficult situations.
Best Liquid Lawn Fertilizers
1) Advanced 16-4-8 Balanced NPK
This Simple Lawn Solutions’ Advanced 16-4-8 liquid fertilizer is an excellent choice, even if you are a beginner. It’s a concentrated spray for spring and summer and works on any grass. It is specifically made for repairing lawns and treating lawn deficiencies.
The NPK ratio contains all the nutrients, which makes your turf healthy and dense again. It also has seaweed and fish as organic matter. The phosphorus present in the fertilizer is excellent for root strengthening and deepening, while the potassium boosts hardiness and resilience against harsh environmental conditions.
It’s extremely easy to use. Just connect the water hose to the bottle and spray it on your lawn. There is no mixing required, as it has the required premixed ratio and is ready to go.
It’s a complete all-in-one solution with all essential macronutrients. It enhances vertical and lateral growth.
2) Scotts Liquid Green Max Lawn Food
Scotts Liquid Green Max Lawn Food is a 2-in-1 formula that feeds your lawn with essential macronutrients and also works as an iron supplement. If you want to make your lawn green quickly, it’s a perfect option. It just needs three days to turn your grass green again.
It can be applied to any grass type. You can use it any time of the year, from early spring to late fall. It contains 29% nitrogen to feed your grass and 0.5% iron, which gives your lawn a deep green color. The best part is that it also contains 5.8% slowly available nitrogen from Triazone, which is available for your lawn for a longer period.
Just make sure to use it on an actively growing lawn. Do not use it on areas that are bare and dead. You only need to connect the hose to the bottle, and it is ready to be sprayed. It covers an area up to 2,000 sq. ft.
3) PetraMax Neighbor’s Envy Grass Fertilizer for Lawn & Garden
This is a 7-in-1 liquid fertilizer that not only feeds your lawn but also solves multiple issues and boosts health in different ways. It contains 7 key nutrients that are responsible for deep green color, root strength, stress resistance, and long-lasting health.
Firstly, it has 19% nitrogen to boost the lawn’s growth. It has 2.5% iron to provide the lawn with a deep green color. There is also 3% humic acid to enrich the soil.
The 1.5% potassium strengthens the grass roots. The sea kelp improves drought resistance, while sulfur enhances soil health.
It works on all grass types and gives quick results within 7-14 days. It keeps your lawn lush, resilient, and stress-free year-round.
It’s a safe and eco-friendly liquid fertilizer. It’s made with non-toxic ingredients. It’s safe for pets, kids, and other plants in the lawn.
Keep in mind that it is not a spray bottle. You have to prepare the solution as recommended in the instructions. 1 gallon is enough to cover an area up to 16,000 sq. ft.
4) The Urban Farm Liquid Lawn Fertilizer
It’s a 13-1-2 liquid lawn fertilizer to feed your lawn with essential macronutrients as well as micronutrients. Nitrogen improves growth, while phosphorus enhances root development. The presence of potash ensures resilience against heat, drought, and other environmental conditions.
It also contains a wide range of micronutrients, such as iron, sulfur, magnesium, boron, manganese, molybdenum, copper, and zinc. This is what lacks in most liquid fertilizers. It not only works in macronutrient deficiency but also enhances micronutrients for better growth of grass.
With 1 gallon, you can treat a 5,000 sq. ft. lawn eight times with a hose-end sprayer. You need to prepare the sprayer solution. And you can use it 2-3 times per month. It gives results within 7-10 days.
5) Petramax Liquid Nitrogen Fertilizer
Petramax Liquid Nitrogen Fertilizer has an NPK of 28-0-0, which means it is a nitrogen fertilizer. It is perfect for the active growing season and gives your lawn a boost in growth. You can use it in the summer and spring to feed the lawn.
It turns your yellow nutrient-deficient grass into thick and green. The best thing about this fertilizer is its 2-in-1 formula. It has 70% quick-release nitrogen that offers results in minimal time and for a short period. The remaining 30% nitrogen is slow-release, which is meant to feed your lawn for a long time.
Whether you want to fertilize for maintenance or correct the nitrogen levels in the soil, it is a perfect option. It is suitable for up to 12,800 sq. ft for maintenance and treats up to 6,400 sq. ft. of nitrogen-deficient grass. It works on all grass types and both new and old lawns.
It’s 100% safe for pets and kids. Just follow the instructions and apply without any worries.
How to Apply a Liquid Lawn Fertilizer?
Mow the Lawn
Mow the lawn 24-48 hours before applying a fertilizer. It increases the surface area for better foliar absorption.
You can use a robot lawn mower to mow the lawn without any hassle. Just set the schedule and desired mowing height, and it will do the job on its own. It also automates your regular lawn mowing. You will never have to push a mower or waste your weekends. And you can enjoy a perfectly manicured lawn year-round.
For small lawns, you can go with the Navimow i2 AWD series. The compact mowers cover up to 0.25 acres and handle difficult terrain. If you have a large lawn, you can opt for the Navimow X4 series. These are powerful robot mowers for any kind of grass, be it long, thick, and dense. They can mow up to 1.5 acres.
Plan the Application
Before applying, plan the route. This way, you don’t waste any fertilizer or use it more than once in any area.
Secondly, you need to fertilize at the right time. Read the instructions on the fertilizer label. You can apply in the morning or evening. Never apply during mid-day as sunlight and high temperatures lead to fertilizer burns.
Also, make sure the day is non-windy and clear. Check the weather forecast to plan the right day.
Use Hose-End Sprayer
In some liquid fertilizers, you can directly attach the hose-end sprayer and start the application. It is quite user-friendly. However, some fertilizers require you to prepare the solution.
Before application, it is recommended to water the sidewalks and areas. It prevents staining.
Apply Evenly and Cover the Lawn
Apply the fertilizer evenly on the lawn. Go as you have planned the route.
Cover every area. It is better to go in parallel lines back and forth. You can slightly overlap the previous line to ensure there is no space left.
Keep the sprayer at a consistent height and walk at a steady speed.
Clean the Gear
After the application, it is necessary to clean the gear. If you have used a backpack sprayer, wash it with warm, soapy water immediately. Otherwise, the fertilizer could corrode the seals and clog the nozzles.
Final Words
Liquid fertilizers are convenient and fast-acting. You get quick results without much hassle. But choosing the best liquid fertilizer could be difficult if you don’t know what to look for. We have explained the types of liquid fertilizers and the factors you need to consider while buying them. Now, you might have a clear idea of how you can choose the best liquid fertilizer for your lawn and keep your grass healthy and green year-round.
