Is Cornmeal Good For Flower Beds? (Expert Advice)

Cornmeal, a common pantry staple, has been touted as a natural weed control method for flower beds. But is it truly effective, and what are the potential downsides? In this informative blog post, we’ll examine the science behind cornmeal as a weed killer and offer expert advice on how to use it in your flower beds.

While exploring the world of flower bed care, you may also be interested in discovering how to get rid of snails in your flower beds or how to keep mushrooms from growing in your flower beds.

Key Takeaways
Cornmeal is not effective in controlling fungal diseases in plants.
Cornmeal can be used as a soil amendment to improve soil structure and add organic matter.
Cornmeal has been shown to suppress weed growth in some cases, but its effectiveness varies depending on the type of weed and the amount of cornmeal applied.
Cornmeal should be applied in moderation, as excessive amounts can lead to nitrogen depletion in the soil.
Alternative methods for weed control in the garden include using mulch, hand weeding, and using natural herbicides such as vinegar or boiling water.

Keep reading to enhance your gardening knowledge and create a thriving, weed-free flower bed with natural methods.

Is Cornmeal Good For Flower Beds?

If you’re looking for a fine, powdery product made from dried corn that is used to make breads, cakes and other baked goods, you’ve probably already jumped straight to this article. 

But if you haven’t heard of cornmeal before, let’s start with the basics:

Cornmeal is also used as a thickener for soups and stews. It can be used in place of flour to make polenta (a type of porridge or grits), which is popular in Italian cuisine. 

However you choose to use it, cornmeal makes an excellent addition to flower beds because it helps retain moisture in soil while adding nutrients like nitrogen, phosphorus and potassium! Before you go out there with a bag full though – here are some tips on how much is too much.

“Eggshells are an excellent source of calcium, which is an essential nutrient for plants. They also help to improve soil structure and prevent blossom end rot in tomatoes. Learn more about the benefits of eggshells for your garden soil.” – Are Eggshells Good for Your Garden Soil?

Keeps Your Flower Beds Pest-Free Naturally

One of the most appealing things about cornmeal is that it repels and kills pests. Cornmeal is an organic insecticide that can be used in your flower beds to keep them free of pests, making them more beautiful and healthy.

It’s one of the best options for controlling pests because it’s completely natural, safe for humans, bees and beneficial insects (like ladybugs), and won’t harm your plants or crops. The cornmeal will kill aphids (plant lice) on contact—but they have to come into contact with it first!

It’s an Environmentally Friendly Weed Killer

Cornmeal is a natural herbicide, meaning that it will kill weeds but not harm other plants. It won’t harm animals or humans, and you don’t need to worry about it being toxic to your soil or harmful to bees or other beneficial insects.

You Don’t Have to Dilute or Mix It With Water

Finally, don’t be afraid of using cornmeal in your flower beds. It’s not toxic to animals and you don’t have to dilute it or mix it with water. Simply sprinkle it on the ground where you want to grow your flowers. 

Cornmeal is often used as a fertilizer for plants and vegetables, but there’s nothing wrong with using it as a bedding material—as long as you use it correctly!

Cornmeal won’t harm children or pets if they get into your flowerbeds; in fact, the tiny particles are great for attracting insects that will help pollinate nearby plants. 

If you’re still worried about safety, consider placing mulch around the edges of your flowerbeds so that kids can play safely without getting in trouble with their parents!

“Leaves are a free and natural source of organic matter that can improve the structure, drainage, and water-holding capacity of your garden soil. Discover how leaves can benefit your garden and how to use them effectively.” – Are Leaves Good for Garden Soil? Explained

It’s a Great All-Around Fertilizer for Your Plants

Cornmeal is a great all-around fertilizer for your plants. It can be used as a fertilizer, soil amendment and more. Cornmeal is also easy to apply! Here are some ways you can use it in your garden:

Fertilizer: Adding cornmeal to the soil will increase the amount of nitrogen in the soil and help build up organic matter. This gives your plants access to nutrients they need to grow healthy roots and produce good fruit or seeds.

Soil Amendment: Cornmeal makes an excellent organic soil amendment that loosens clay soils while maintaining moisture levels in sandy soils when mixed with compost or manure (or both). 

Cornseed meal also contains natural microorganisms that break down organic materials into compost that improves drainage even further. Truly one of nature’s best green fertilizers!

Top Dressing/Mulch/Soil Conditioner: Cornmeal has been used for years as an inexpensive way of conditioning sandy soil without disturbing existing top layers because it doesn’t clump together like other types do like wood shavings do when wetted down by rainwater run-off from overhanging trees etcetera….

A Little Goes a Long Way

Another benefit of using cornmeal for your flower bed is that you can use it in small amounts. We know you’re probably wondering: how much will I need?

It’s easy enough to figure out—just spread out some soil and start sprinkling a little bit at a time, working the powder into the dirt with your fingers. As long as you keep adding evenly, you’ll have no trouble getting it right. 

You don’t have to worry about running out of cornmeal before finishing your project either; since it dissolves so easily, there won’t be any left behind once everything has been absorbed into the garden.

If you want to go for something more natural than plain old white cornmeal, there are other options available as well: brown rice flour or wheat germ meal work just as well but may cost slightly more due to their higher quality ingredients and lack of preservatives (which means they can last longer in storage). 

They also give off different colors depending on which type of plant they’re used around!

“Pecan shells are a great way to improve the quality of your garden soil, especially if you have alkaline soil. They are rich in carbon, nitrogen, and other nutrients that plants need to thrive. Learn more about the benefits of pecan shells for your garden soil.” – Are Pecan Shells Good for Garden Soil? Find Out Now!

You Can Spread it Anywhere, Even in Places Not Intended for Plants

Cornmeal is one of the most versatile fertilizers you can use. It’s a great weed killer, so you can spread it on the ground and around your plants if needed to keep them healthy. 

Cornmeal also works well in flower beds, but it can also be used in areas where there are no flowers or other plants at all. In fact, cornmeal has an almost infinite number of uses outside of gardening; it’s even been used as an ingredient for homemade deodorant!

It Has Organic Weed Killing Powers

Cornmeal can act as a food, but it can also act as a weed killer. If you’re looking for an organic solution, cornmeal is a great way to kill weeds without harming your plants. Cornmeal does this by drying out the plants and suffocating them in the dirt.

When you use cornmeal for weed control, keep in mind that it will only kill small weeds (like chickweed) that are growing close to the surface of your flower beds or garden beds. 

This means that you may still need to use other types of chemical weed killers when dealing with large weeds like dandelions or thistle which grow deep into the soil where they’re harder to reach with organic methods such as cornmeal alone.

“Worms are some of the best allies for gardeners, as they help to improve soil structure, aeration, and drainage. They also break down organic matter and release nutrients into the soil, making them available to plants. Discover why worms are good for your garden soil.” – Are Worms Good for Garden Soil?

It’s Inexpensive with No Added Costs After Purchase

Cornmeal is inexpensive, and you can find it at any big box store. Because of the low price point, cornmeal doesn’t require a large initial investment to get started with your flower beds, but you’ll be able to use it over and over again as an effective fertilizer.

If you have a large flower bed that needs fertilizing, cornmeal may seem like an affordable option that’s also convenient and easy to use.

It’s Super Affordable and Has Multiple Uses (Including as Food!)

Cornmeal is one of those foods that has a lot of uses. It makes for a great alternative to flour in baking, and can even be used as an egg substitute in recipes where you need a thickener. It’s also full of fiber, which will help keep you regular and prevent colorectal cancer. Plus it’s super affordable!

Cornmeal is great for making muffins, breads, pancakes—you name it! If you’re on a budget or just want to try something new with your diet this summer season then check out this list for ideas:

  • Make cornbread muffins (recipe here)
  • Make cornbread waffles (recipe here)

“Wood chips can help to improve soil fertility, retain moisture, suppress weeds, and protect plant roots from temperature fluctuations. However, they should be used with caution, as they can also deplete nitrogen and create a nitrogen deficiency in plants. Learn more about the pros and cons of using wood chips in your garden soil.” – Are Wood Chips Good for Garden Soil? Brief Explanation

You Can Combine Cornmeal and Other Products for Better Results

Cornmeal is a good all-around fertilizer, but it’s also an effective weed killer. If you want to get rid of the weeds in your flower bed without using chemicals, cornmeal is a great option.

You can combine cornmeal with other products to create a more potent solution that will kill more than just the surface weeds. 

For example, if your soil test results show that you need potassium, phosphorus and calcium but not as much nitrogen, then add some bone meal or colloidal phosphate along with some lawn fertilizer (which contains lots of nitrogen). 

The bone meal and colloidal phosphate will provide what your plants need while the lawn fertilizer adds an extra dose of overall nutrients—just be careful not to overdo it!


Cornmeal is a natural product that can be added to the soil to improve it by increasing the amount of organic matter. 

It is not only safe for humans and pets, but also beneficial for plants. Cornmeal adds nutrients to the soil and improves its structure by allowing more water to penetrate into the ground while providing support for roots.

Further Reading

Cornmeal Myth Busted: A comprehensive article discussing the myth that cornmeal can control fungal diseases in plants, and why it doesn’t work.

Uses of Cornmeal in Gardens: A brief article explaining some of the ways cornmeal can be used in the garden, including as a soil amendment and weed suppressant.

Gardening Tips: How to Remove Weeds with Cornmeal, Alcohol and Mulch: A short article outlining some unconventional methods for removing weeds in the garden, including using cornmeal.


1. Is cornmeal effective in controlling fungal diseases in plants?

No, cornmeal is not effective in controlling fungal diseases in plants. This is a common myth that has been debunked by scientific research.

2. Can cornmeal be used as a soil amendment?

Yes, cornmeal can be used as a soil amendment to improve soil structure and add organic matter.

3. Does cornmeal suppress weed growth in the garden?

Cornmeal has been shown to suppress weed growth in some cases, but its effectiveness varies depending on the type of weed and the amount of cornmeal applied.

4. How should cornmeal be applied in the garden?

Cornmeal can be applied directly to the soil or mixed with water to create a cornmeal tea. It should be applied in moderation, as excessive amounts can lead to nitrogen depletion in the soil.

5. What are some alternative methods for weed control in the garden?

Some alternative methods for weed control include using mulch, hand weeding, and using natural herbicides such as vinegar or boiling water.