A Look At How To Add Potassium To Lawn - Grower Today (2023)

Last Updated on October 26, 2022

Let’s learn how to add potassium to the lawn as it’s an essential micronutrient that prevents diseases and promotes healthy growth.

Your lawn requires a good amount of potassium, depending on the naturally present amount in the soil. If your soil is naturally low in potassium, you will need to supplement it with are potassium-rich fertilizer. To determine how much potassium is in your soil, you will need to conduct a soil test. A soil test showcases what is available, and the nutrient is missing from the soil for more accessible nourishment of your soil.

Table of Contents

What Is Potassium?

Firulais rescata a panchito que cay...

(Video) Part1: Adding Potassium or Potash to the Lawn

Firulais rescata a panchito que cayó a la piscina 🤣🐶

Potassium, sometimes referred to as potash, is an essential nutrient that your soil requires. It helps your grass take other nutrients and use them. It also helps in building strong cell walls within the grass or plants.

These cell walls are what keep your plants healthy and resilient in times of stress like disease, drought, or severe temperatures.

A Look At How To Add Potassium To Lawn - Grower Today (1)

As your grass grows, potassium lawn fertilizer is needed for that growth. It helps the grass get strong deep roots and causes it to grow faster. A lawn that lacks enough potassium may grow slowly and have shallow roots. This means the grass won’t be able to withstand environmental stress as best as it should.

How To Carry Out A Soil Test

You can carry out the soil test on your own by buying a soil test kit from your gardener’s shop. You can also ask your local extension officer to provide soil containers and information on performing a soil test full stop use a hand trowel to collect soil samples from around your lawn.

Scoop about 10 to 15 samples from your yard at a depth of 3 inches and combine them. Leave the soil samples to dry and package them in containers you are provided with by the extension officer. After that, male the soil samples to the extension officer for testing and wait for results. Results take about 3- 5 days.

How To Tell If Your Lawn Has Enough Potassium

There are a few signs to look out for when you’re trying to decide if your soil has enough potassium. Your grass will show signs of stress that include slow growth, yellowing or being highly susceptible to changes in temperature.

Sometimes just looking at your grass with your physical eyes might not give you the results that you want. So it is advisable to test your soil for potassium deficit before drawing conclusions.

Luster Leaf 1601 Rapitest Test Kit for Soil pH, Nitrogen, Phosphorous and Potash, 1 Pack

(Video) Part2: Adding Potassium or Potash to the Lawn

A Look At How To Add Potassium To Lawn - Grower Today (2)

Choosing A Lawn Potassium Fertilizer

Lawn fertilizer has a high ratio of potassium. This fertilizer is rated using three numbers representing the percentage of nitrogen, phosphorous, and potassium they contain. The third number in the sequence presents the concentration of potassium in the fertilizer. In most cases, you can use a fertilizer that has all of the three macronutrients. If your lawn has less than 25 parts per million of potassium, use a fertilizer with a high potassium concentration for yards.

Adding Potassium To Your Lawn

Once you learn your lawn is lacking enough potassium, it’s time to add some.

Apply potassium fertilizer biannually each spring and fall. You will have to add this fertilizer based on the results of the soil test. Your extension officer should advise you what type of potassium fertilizer you should purchase and how much you should apply.

For example, 6 pounds of potassium can go 1,000 sq ft of lawn; this applies to lawns that are between 0 to 25 PPM. Yards that are between 25 to 50 PPM require 4 pounds of fertilizer. Those with 50 to 75 PPM need to pounds of fertilizer, while those that are between 75 and 100 will need 1 lb per 1,000 square feet.

Ensure that you spread your potassium fertilizer evenly all over the lawn. Feed your lawn when the weather is excellent and the soil is dry.

You can also use compost three times a year to increase potassium levels within your soil.

Choosing The Best Potassium For Your Lawn

When choosing the best potassium product for your soil you can use either a long-term or short-term solution. We recommend choosing soluble potassium to help stimulate photosynthesis in plants allowing your grass to remain healthy for long. The main advantage of soluble fertilizers is that they dissolve quickly in water, delivering them into the grass relatively quickly.

(Video) What Does Potassium Do For Your Lawn and Grass?

Most people opt for fast-acting solutions like potassium sulfate or potassium chloride is there a cheaper option. These two minerals are commonly used for lawn winterizing. Either of these two are a good option but potassium sulphate is a better option as it doesn’t interfere with the good bacteria in the soil.

Before applying any fertilizer, read the label carefully and gather all the information about it as much as possible.

Here are some potential solutions that you can use

  • Use Dried Kelp Meal. It has a lot of nutrients that are valuable to the soil and when used it restores potassium levels in your soil
  • Use Hardwood Ash. This powder is full of potassium and you can apply straight to the soil or add it to your compost. It is especially significant if you want to increase the pH levels of your soil as well, but before you do so and sure that you monitor your grounds’ acidity.
  • Use Sulphate Of Potash Magnesia. This is also known as Sul Po Mag. It is pretty affordable and increases the levels of both magnesium and potassium in the soil.
A Look At How To Add Potassium To Lawn - Grower Today (3)

You can also choose the slow-releasing potassium fertilizers as they will feed your grass slowly for a long time.


How do I raise the potassium in my yard?

Potassium is an important element that makes up a plant’s cells. A deficiency of potassium can lead to stunted growth, poor flowering and reduced yields. Potassium is also used by plants as an energy source. The most effective way to supply potassium is to use rock phosphate or bonemeal. These fertilizers contain a high concentration of potassium. Use them at recommended rates to avoid excess applications and damage to the soil. Organic Potassium can be added to the compost pile or applied directly to the garden as a foliar feed. If you are using manure, apply it as a top dressing after the first application of fertilizer, or use a high-potassium fertilizer such as blood meal. If you are not using manure, use a low-phosphorus fertilizer such as 10-10-10. When you apply potassium fertilizer, apply only enough to cover the top inch of soil.

How do you fix potassium deficiency in soil?

Potassium is the most abundant cation in the earth's crust. It is present in all living organisms and many minerals and rocks. Potassium is a macronutrient needed for growth and development of plants. Plants also need phosphorus, nitrogen, and sulfur to make up the major part of their biomass. These elements are called micronutrients, which are needed in smaller amounts than macronutrients.

When potassium is not available in sufficient quantities to meet the plant's needs, the plant may experience leaf chlorosis and leaf spots. These symptoms usually occur if the potassium is present in the soil at more than 100 times the normal amount. The most common symptoms of potassium deficiency include poor fruit set, leaf spot, and reduced growth. There are several methods to correct potassium deficiency. If you want to increase potassium levels in your soil, you can add potassium-rich compost or manure to your soil. You can also buy potassium-rich compost from a local nursery. If you are using a potassium-rich compost, make sure that you also have a source of nitrogen and phosphorus in your soil. You can also apply a potassium fertilizer to your soil.

(Video) How to Increase Potassium 'K' Levels in your Lawn

What is a natural potassium fertilizer?

The most populars is wooden ash.
Potassium is a naturally occurring mineral that helps maintain the pH balance of the soil. Potassium helps plants absorb water, and it also promotes the growth of roots.

The use of potassium in the form of a fertilizer is known as potassium (K) fertilization. Potassium can be applied to the soil in two ways: as a foliar spray, or as a root-applied fertilizer.

A natural potassium fertilizer can be applied at any time of year, but it should not be applied in the fall or spring when the plants are dormant.

Can you put too much potassium in your lawn?

The answer to that question is a big "maybe." But it's not a good idea to add a lot of potassium to your lawn. It can do harm to your lawn, and the best way to deal with this problem is to keep an eye on your potassium levels in the soil and not apply too much at once. Potassium is one of the macronutrients that lawns need in order to grow properly.

Final Thoughts

Lack of potassium is a significant problem for any homeowner who wants to have a nice yard. Besides grass it also affects other plants in your garden; this is why you need to test your soil regularly to ensure it has enough potassium.

(Video) Does Potassium Help Your Lawn?

Now that you know how to add potassium to the lawn you shouldn’t have any issue regulating potassium levels in your soil. It is easy to handle the potassium problem, whether in your yard or garden. Always ensure you test your soil at least twice a year for an updated review. Happy gardening!


What is the fastest way to add potassium to soil? ›

What is the fastest way to add potassium to soil? Potassium Sulfate (Sulfate of Potash) is going to be your fastest way to correct low potassium. This powerful stuff contains 50% potassium and is released rapidly.

What is a good source of potassium for lawns? ›

Wood Ash: The original source of “potash” fertilizers, hardwood ashes can be used directly as a fertilizer (about a 5-gallon bucket per 1000 square feet) or added to your compost pile to increase the potassium content. Wood ash also raises soil pH, so be sure to do regular soil testing to make sure it stays balanced.

When should you apply potassium to your lawn? ›

Potassium is very important to apply prior to entering cooler months to protect the roots from frost and strengthen the plants' cell walls allowing it to better retain nutrients. This will result in strengthening your lawn to withstand the harshness of winter while helping it look great in spring!

Can too much potassium hurt your lawn? ›

Too much potassium does not directly harm the health of your lawn, however, it will affect the way that your soil absorbs other nutrients. Therefore, too much potassium will lead to the deficiency signs of nitrogen and phosphorus.

Can I apply potassium to my lawn in summer? ›

Applying Potassium while fertilizing during the late spring and summer and adding it during the late fall season will only make the grass hard even before the cold frosts finally come. Opting for the slow-release fertilizers can also help in adding good effects to your lawn.

What is a good source of potassium for soil? ›

Typical sources include mined rock powders and wood ash. Of course, manures, compost and other organic materials are potassium sources, too, because even though the concentration of potassium in them is pretty low, typically a lot of material is applied to a field.

What fertilizer is rich in potassium? ›

Potassium Chloride — also known as Muriate of Potash, is the most widely used potassium fertilizer.

How can I get immediate potassium? ›

Eat potassium-rich foods as soon as you suspect your potassium levels might be too low. Early symptoms might include fatigue, weakness and muscle cramps. The best foods to eat include bananas, potatoes, acorn squash, spinach, melon or beans.

Does potassium make grass greener? ›

Many lawn fertilizers emphasize the first number nitrogen because it helps grow green, lush grass, but potassium plays a critical role in plant growth and health too. Potassium assists in better water and nutrient uptake while helping synthesize proteins and starches.

Can you over fertilize with potassium? ›

Although extra potassium may not damage plants directly to begin with, it will eventually have serious indirect effects on overall plant nutrition. Excess potassium affects overall plant nutrition by preventing the plant from taking up other mineral nutrients, in particular magnesium, iron, zinc, and calcium.

How do you know if your soil needs potassium? ›

Typical symptoms of potassium deficiency in plants include brown scorching and curling of leaf tips as well as chlorosis (yellowing) between leaf veins. Purple spots may also appear on the leaf undersides. Plant growth, root development, and seed and fruit development are usually reduced in potassium-deficient plants.

Can you rake too much potassium? ›

Although your body needs potassium, having too much in your blood can be harmful. It can lead to serious heart problems. Having too much potassium in your body is called “hyperkalemia.”

How long does potassium last in lawn? ›

Different sources think the world supply of potash can last up 400 years! Fall feeding and seeding is a great time to repair summer damage.

How do you apply potassium? ›

Apply granular potash fertilizers directly on top of the soil. If you're using a solid form of potash, such as potassium chlorate or potassium sulfate, apply it as a topdressing before planting or mix it into the top layer of soil near your seeds at planting time.


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