Onions form a part of our staple diet. We have it in almost every food we have. From sandwiches to a proper meal, every food has onions in it.
Hence, most of us want to grow onions in our backyard or commercially. This way, we do not have to spend much money behind buying onions from the market.
However, just like any other plant, onions also have favorable growing conditions. As it grows underground, onions need specific nutrients and water supply to be healthy and tasty.
So, the place where you are growing your onions might lack a few nutrients, which leads to poor quality as well as yield. The best way to solve this problem is by using a good quality fertilizer that would help you to farm the best quality onions.
Now, we all know that the market is filled with several fertilizers which promise to help you grow the best quality vegetables, fruits, grass, and more. Selecting from a wide range of products can get exhausting, especially if you are planting anything for the first time.
That is why, to help you, we have created a list of the best fertilizer for onion that you can buy. But, before we start with the list, we would also like to give you some fertilizing tips that you can follow. So, without any further ado, let us get started with the tips.
Tips For Using Best Fertilizer For Onion
Onions need high quantities of nitrogen for their growth. The first thing that you should keep in mind while buying a fertilizer is that it should have a strong nitrogen base.
The compost should also contain ammonium nitrate and ammonium sulfate. The fertilizer should be applied every twenty feet of a row.
After planting the onions, you should wait for three weeks before you first use the fertilizer. After that, you have to use the fertilizer every one or two weeks.
In case the fertilizer is highly concentrated, then you would have to apply it every three or four weeks.
The most important thing that you should remember while using fertilizer is that using too much of anything can damage the quality of the onions.
You should always strictly follow the instructions of use, which are written on the packet of the fertilizer. After you have applied the compost and the neck starts to feel soft, you should not apply any more fertilizer.
After you have applied the desired fertilizer, you should also immediately water the onions. You should also maintain the moisture content of the soil during the entire growing season.
When the onion reaches the harvest time, it would require more water than ever. If you are worried about the pests and insects of the field, then you can look for fertilizers, which are both feeder and an insecticide.
This type of fertilizer would help you to keep all the unwanted insects and pests away from your precious onions without harming the quality of their yield.
There is no doubt that the best fertilizers are organic ones. Organic fertilizers are beneficial as they are rich in nitrogen and all the other essential nutrients that the onions need for growing.
In addition to that, organic compost also does not have harmful chemicals inside it that might affect the health of the onions.
Hence, these were the few tips that you can follow while buying as well as using the best fertilizer for onions. Now that you already have an idea about onion fertilizers let us get started with our list of the best fertilizer for onions.
Here is our comprehensive list of the best fertilizers for onions that you can buy from the market. They would help you to grow the best-quality onions in no time. So, let us get started with the list.
Top 14 Best Fertilizer For Onions Of 2021
1. Unco Industries WWSB15LB
This fertilizer by Unco Industries was known as the most excellent organic fertilizer of the world since it’s commencement. It is the best all-purpose fertilizer that you can use both at your house garden or your farmlands.
It is an earthworm fertilizer that you can use in your flowers, vegetables, and houseplants. The earthworms are fed a rich organic material that contains various trace elements and minerals.
It is a super humus product that is exceptionally fertile and organic. It has high quantities of beneficial bacteria, as well as microbes added in the fertilizer. This microscopic creature ensures that the soil gets fertilized correctly.
- It is a non-toxic fertilizer.
- It is an odor-free fertilizer.
- It is made up of natural ingredients. Hence, the fertilizer can be used both for outdoor and indoor purposes.
- This fertilizer is expensive.
- Some customers have complained it did it not work that well with every type of plant that they were growing. It did great on some plants while not working on the others.
The nutrients in the fertilizer are balanced in two groups. One group gets absorbed immediately by the plant, and the other gradually provide the plant with nutrients over time. It is overall the best fertilizer that you can buy.
2. Miracle-Gro Garden Feeder
This garden feeder by Miracle-Grofeatures the spray patterns, which includes stream, jet, and shower. It is our second pick for the best fertilizer for onions. With this product, you would be able to take care of your plans quickly.
The product is water-soluble. Hence, you can easily mix the fertilizer directly with water and spray it on your pants. This way, you would be able to feed nearly five hundred square feet in only fifteen minutes. It contains one lb of fertilizer.
It comes with an easy-to-grip handle. Hence, the user can smoothly spray the fertilizer without feeling any pain. The trigger with a lock system offers one-handed control.
- It is cost-effective.
- It can be used with any type of plant.
- Some customers have complained that the product comes with a leaking bottle.
- The product contains fertilizer in it, which can ruin the quality of the water.
You can use this product to feed your plans for every one or two weeks. You would be provided with remarkable results. It can be easily used as it comes with different spraying options.
3. EarthPods Premium
This all-purpose organic fertilizer comes in twelve different colors. The box contains a hundred pre-measured fertilizer capsules, which are termed as EarthPods. Hence, the buyer does not have to work with messy liquids or measuring spoons.
The buyer needs to push the EarthPod into the root area near the plant’s center. Then they need to water the plant. The EarthPod would slowly break down and gradually release nutrients directly to the roots.
The fertilizer is made up of a wide variety of healthy organic play nutrients, fungi, hummus, fulvic acid, and trace minerals that would highly benefit the soil root bacteria. All these nutrients are in a form which the plants can update immediately.
- The capsules do not leave a bad smell after use.
- The buyers would not get their hands dirty using the capsules.
- The capsules start breaking down in a few minutes.
- The buyer needs to be very careful about storing the EarthPods. They need to stay in a cool, dry, and safe room. If the temperature is humid, then the capsule might breakdown.
This fertilizer helps in stimulating robust root growth, creating fertile loamy soil, builds disease resistance, enhances the vibrancy of the color of the leaves, and also helps in active stem development.
4. Miracle-Gro Water Soluble
Your plants would be able to flourish throughout any season if you use this fertilizer. It is a powdered product that is a hundred percent water-soluble. The best thing about this product is that it can be used on any plant.
The fertilizer instantly feeds the houseplants, vegetables, and trees. The formula can be safely used irrespective of the growing season. There are no chances of any burn if the buyer follows the directions correctly.
For outdoor plants, the buyer needs to mix one tablespoon of the feeder in a gallon of water. In the case of indoor plants, the buyer needs to mix half a tablespoon of the feeder in a gallon of water.
- It comes with a watering can that helps in spraying the feeder on the plants quickly.
- It is cost-effective.
- You do not have to use the feeder frequently. You can use it every one or two weeks.
- The fertilizer contains phosphorus that can be quite harmful to the water. Hence, the buyer needs to make sure that the water quality remains stable.
The feeder includes potash, phosphate, nitrogen, and all the other nutrients which are required for boosting the growth and the quality of the plant.
5. Dr. Earth Home Grown Tomato
This fertilizer by Dr. Earth is one of the best fertilizers for onions. It comes in seven different sizes, and it would make your onions not only the tastiest but also healthy and big. You can use this both for outdoor planting and indoor planting.
The fertilizer is rich in seaweed extract, mined potassium sulfate, fish meal, alfalfa meal, kelp meal, feather meal, and fishbone meal.
The fertilizer produces remarkable results as the nutrients are released immediately after reaching the soil, but it continues to feed the plant for months.
- The fertilizer can be used during the initial planting of the seeds, during transplanting, or regularly as a compost tea or a top dressing.
- The fertilizer is formulated for feeding winter and summer crops, vegetable gardens, native backyard soil, and container plantings.
- The buyer does not even have to use a lot of fertilizer to feed the plants.
- If you are looking for budget fertilizer, then this is not the ideal product for you. It is costly compared to all its counterparts.
- Some customers have complained that their plants had mold growing in it after the application of the fertilizer.
The fertilizer can be the perfect match for you only if you are not in the budget. This is an organic fertilizer, which means your plants are completely safe from all the harmful chemicals.
6. Organic Blood Meal 50lb Bag
If you are looking for a robust fertilizer for your plants, then this is the product for you. It comes with all the necessary nutrients like potassium, phosphorus, and nitrogen that is highly essential for your plants.
This fertilizer is a hundred percent organic, and pure that also acts as an insecticide. It’s an excellent product for removing all the insects and pests from the garden.
It offers a slow-release nitrogen fertilizer that has a ratio of 13-1-0. A part of the fertilizer gets absorbed immediately while the other part stays nourishing the plant for a prolonged period. The product contains 50 pounds of granulated fertilizer.
- Some customers have reported that the product gets delivered fast.
- The packaging is safe and secure. Hence there is no loss of product.
- Being made from the blood of an animal, it is highly rich in a nutrient that helps the plants to reproduce and healthy.
- It is costly.
- Some customers have complained that the product is not meant for heavy-duty plantation jobs.
As this is a blood meal fertilizer, it is any day good from its counterparts. However, the only problem with this product is that is very expensive. If you are not worried about spending a lot of money, then you can definitely buy this product.
7. Urea Fertilizer 46-0-0-5
Urea fertilizer has been one of the most loved fertilizers of people since it’s commencement. This product has a strong nitrogen base. Hence, even if the soil lacks nitrogen in high quantities, the compost would make sure that the plants are provided with the required amount of nitrogen.
The fertilizer has forty-six percent of nitrogen by weight. Hence, it is suitable for trees, shrubs, vegetables, and turf. The buyer spread the manure quickly either by a spreader or by hand.
Not to mention, this fertilizer is a hundred percent water-soluble. In addition to that, it is also non-toxic. Hence, you do not have to worry about your plant’s health.
- As it is an organic fertilizer, there is no harmful chemical inside the product.
- It can also be used for gold refining.
- It is super cost-effective.
- Since this fertilizer has vast quantities of nitrogen in it, and the buyer has to ensure that they do not use it excessively. Too much nitrogen would harm the plant.
This fertilizer is primarily meant for soils that lack nitrogen. Hence, if you do not have a nitrogen problem, buying this product would not be much beneficial for you. However, you can add this product with other organic fertilizers to double the nourishment.
8. Single Jar Makes 90
This is one of the best high-quality play food. The product comes in a ninety-gallon container that would last you for a long time.
This product offers guaranteed results that you can witness within a week of using it. Being an all-purpose feeder it can be used in any plants or vegetables that you want to grow.
It is a professional fertilizer that is also super concentrated. It has an NPK ratio of 20:21:19, which would leave your soil healthy and nutritious seasons after seasons.
It is a hundred percent water-soluble fertilizer that is packed inside a sealed bag. The product also comes with a scoop so that the buyer can use the feeder without facing any difficulty.
- Per gallon of water requires only half a tablespoon of the fertilizer.
- It is cost-effective.
- You can apply the fertilizer using a sprayer.
- Some customers have complained that they are not satisfied with the performance of the fertilizer.
- Some customers have also complained that they have received a different product on delivery.
Since it is a professional fertilizer, it would energize your plants to the utmost level. Using the feeder only once a week would do the job. It can be used on edible plants as well. In addition to that, it is also highly affordable, which makes it a deal-breaker.
9. Miracle-Gro Twelve Plant Nutrition
This product comes in five different varieties. This product contains pre-dosed food packets for plants that would feed the indoor hydroponic plants in a few minutes. There is no need to measure the product. The buyer can simply tear open the packet and add it directly to the soil.
The product contains twelve packets of plant food that has been specially designed for growing the plants in the recirculating, water-based systems. The user does not have to apply the fertilizer more than once every four weeks to obtain favorable results.
It is made up of an impressive blend of all the essential nutrients that a plant needs to grow in a hydroponic system. It can feed a wide variety of herbs, leafy greens, flowers, fruits, and vegetables.
- It is immaculate and comfortable to use the fertilizer. They come in assorted packets that you can just open up and apply directly.
- It is cost-effective.
- It can even work for outdoor plantation.
- Some customers have complained that the seeds do not grow up fast after using the fertilizer.
- Some customers have complained that the packaging was not sturdy enough.
Hence, it can be safely concluded that this product is among the best fertilizer for onions that you would find in the market. The buyer does not even have to add water quite often after using this product. They can just water the plants once every week, and that would be enough.
10. Lilly Miller Morcrop Tomato & Vegetable Food
The product comes in a four-pound pack. It has an NPK ratio of 5:10:10, which is the perfect combination of the essential nutrients that are required for growing better tasting and bigger vegetables.
The fertilizer is fortified with all the essential plane minerals. It is a perfect match for people who want to take care of their vegetables and lush growth.
- It has been specially formulated with both quick and slow-release nitrogen that caters to every gardening requirement.
- The product offers guaranteed results if the user is applying it correctly.
- The product is also super cost-effective.
- Some customers have complained that the fertilizer does not work well on flower plants.
- It contains phosphorus, which might affect the quality of the water. Hence, the user has to keep a check on it while using the product.
This is one of the most inexpensive fertilizers which you would find in the market. It contains all the necessary nutrients, and it would ensure that your plant not only grows healthy but also fast.
11. Urban Farm Fertilizers All-Purpose
This fertilizer is special as unlike its contemporaries, and it is a hand-crafted fertilizer. It is a professional fertilizer. Hence you can use it both in the fields or your house garden. It guarantees to yield excellent quality products in no time.
It is a micro-brewed liquid fertilizer that can be used on any vegetables. It has an NPK ratio of 4.5:2.5:6. It is also super concentrated, 256:1. It means that one-quart gallons can make sixty-four gallons of robust and full-strength fertilizer.
It is a hundred percent water-soluble product that has been precisely blended and formulated. It is rich in calcium.
- It is made up of organic components, minerals, enzymes, kelp, humic acid,and mycorrhizae.
- It is cost-effective.
- It has high quantities of nitrogen as well.
- Some people were disappointed with the packaging of the product.
It can be used as a dry mix formula or if a super-concentrated liquid formula. It offers the best quality results in the shortest time. Hence, if you want a robust fertilizer, then this can be your perfect choice.
12. Natural Alternative 5-5-5 Organic All-Purpose
It can be used on roses, bulbs, shrubs, trees, perennial flowers, annual flowers, and vegetables. The fertilizer also helps in protecting the plant from the transplant shock.
It can cover up to two hundred square feet of the yard or garden space. It contains an adequate amount of phosphorus, which is suitable for starting plants.
- It is the completeness with beneficial microbes that protect the plant pathogens.
- It is cost-effective.
- The user does not need to apply the product not to once every four weeks.
- Some customers have complained that the built-in shaker that comes with the product does not work well.
If you are a busy person and do not have enough time to spare behind gardening, then this the best fertilizer for onions for you. You can smoothly apply the fertilizer into large areas without facing any difficulty.
13. Vigoro 3.5 lb. Tomato and Vegetable
This product helps in promoting high yields and vigorous growth. It also helps in preventing splitting and blossom-end rot. Hence, it caters to various other gardening requirements, which makes it different from its counterparts.
It helps in growing better quality vegetables and fruits. The buyer does not have to worry about any harmful chemicals going inside their plants as it is a hundred percent organic fertilizer. The buyer, however, needs to water their plants thoroughly for them to absorb the fertilizer.
It has all the essential nutrients like nitrogen, potassium, phosphate, and more, which are required for growing any plant. If the product is not satisfactory, the manufacturer guarantees to provide the buyers with their money back.
- It is cost-effective. Hence, if you are looking for budget fertilizer, you can go for this one.
- It helps in growing a variety of plants irrespective of soil, weather conditions, and plant type.
- It works the best in vegetables.
- Some customers are disappointed that they have to water their plants a lot for this fertilizer to work on them.
- Some customers have also complained that the power of the fertilizer decreases in terms of flowers.
There is no doubt that this is the best fertilizer of onions if you do not want to spend much behind a plant fertilizer.
It can work in any weather condition, and it would also last you for several seasons. Hence, after you invest in this fertilizer, you would not have to worry until the next few seasons.
14. Watch Us Grow All Purpose
This gallon-sized fertilizer by Watch Us is the last pick for our list. It is a highly concentrated fertilizer that you can use to grow any of your favorite plants in a short possible time. It comes in a sealed container that you can easily store anywhere and use it conveniently.
You can apply the fertilizer either by hand or you can mix it with water to spray it on your fields. Apart from feeding your plants with the necessary nutrients, it also helps in preventing pests and insects from reaching the plants.
You can feed nearly five hundred square feet of land at a single go. It is an all-purpose fertilizer that can be used in any plant, vegetable, grass, and more. You can apply the fertilizer just once every four weeks.
- It is cost-effective.
- It is suitable for any type of plant.
- It would last you for a long time.
- Some customers have complained that they have received a leaked container.
You can buy this fertilizer if you are a person who does not want to give enough effort behind gardening.
All you have to do is just sprinkle the compost on the plant and water it a bit. The compost would work on its own and provide you with tasty and healthy onions.
This was our list for the best fertilizer for onions. Any product from this list would help you to cater to most of your gardening requirements, if not all. The best fertilizer that you can buy is no doubt the one manufactured by Unco Industries.
We have, however, provided you with various options. The products listed above differ in pricing, functions, features, and likewise so that you can easily choose a product that you think fits your requirements the most.
Always remember to look through various products before you settle down with the one which is the best for you.