Top 10 Best Fertilizer For Plants and Flowers With Reviews & Buying Guide

Usually, best fertilizer for plants and flowers have a typical formulation that differentiates them from the rest. Their main objective is to stimulate the production of flowers with more vivid colors.

Certainly, applying the wrong type of good organic fertilizer would have the opposite effect. Therefore, it’s important to learn how to choose the best formulation to achieve the desired results.

If you use organic fertilizer for plants, then will get the best results. Because organic grass fertilizer uses as high nitrogen organic fertilizer. So, plants will get the best benefits in organic fertilizer.

Do you know, fertilizers for plants and flowers are quite smelly? That’s because their high phosphorus content, which is commonly present in smelly ingredients like fish meal and seaweed. However, if an organic garden fertilizer is smelly, it doesn’t necessarily mean it’s good for your plants and flowers. There are other things that you should consider.

In this buying guide, you’ll learn some tips to help you identify the type of fertilizer that your plants and flowers need. Here you’ll also find a top 10 list with only the best fertilizers.

Before that, I’ve a quick question for you: do you think buy organic fertilizer is a bad invest for a garden?

Benefits & Common Features

If you dream of having a radiant garden full of large, colorful flowers, you certainly need the best organic fertilizer products. Applying fertilizers on soil and plants certainly gives you more benefits than only using water. Fertilizers accelerate growth of your flowers and plants. That means you won’t have to wait too long to see the results of your hard work.

On the other hand you can make organic fertilizer at home and define organic fertilizer as a homemade organic fertilizer. But if you can’t make, then you can see best organic fertilizer brands from organic fertilizer suppliers. Such as organic blueberry fertilizer, Mill organic fertilizer, Organic NPK fertilizer, Milorganite organic fertilizer or Milorganite organic Nitrogen fertilizer, Milorganite organic lawn fertilizer, best Granular lawn fertilizer, etc. Please don’t try to use synthetic fertilizer or foliar fertilizer. But organic bone meal fertilizer is too good.

Fertilizers help restore soil fertility, ensuring the success of your next crops. Fertilizers for plants and flowers are available in a wide variety of presentations. However, all of them have the following features in common:

  • Rich in phosphorus.
  • Strong smell.
  • Quick dissolution and absorption.
  • Non-toxic.
  • Easy to apply.

Top 10 Best Fertilizer For Plants And Flowers Reviews

Certainly, not all types of fertilizers can give you bigger and more beautiful flowers. In fact, applying the wrong fertilizer could stop flower production or even kill the plant. If you don’t want that to happen, you’d better choose any of the options in this top 10 best organic nitrogen fertilizer. Certified organic fertilizer provides organic fertilizer company. So, you can rely on the best organic lawn fertilizer. You can also rely on organic fertilizer manufacturer which provides organic liquid fertilizer.

1. Miracle-Gro All Purpose Plant Food

This amazing Miracle-Gro fertilizer really does miracles for plants and flowers. In addition, a single application per week is all you need to make them grow strong and healthy. Also, its patented formula is completely safe and won’t burn your plants like some fertilizers.

For outdoor plants, just mix 1 tbsp with 1 gallon of water. Then, apply the solution on the plants and the soil. The results are evident after the first week of use.

  • Easy to apply
  • Highly concentrated formula
  • It doesn’t burn your plants
  • High price

2. Osmocote Smart-Release Plant Food

This product dissolves slowly in the soil, making it more durable than other fertilizers on the market. It’s also ideal for garden plants, flowers, fruits and vegetables. Its high nitrogen content is ideal for the early grow stages. Also, it produces stronger roots so the plants can absorb more nutrients from the soil.

After the product dissolves, the hard spheres then become food for beneficial microorganisms. Also, its balanced 14-14-14 formula makes it ideal for soils with serious nutrient deficiencies.

  • Slow dissolution
  • Dosage varies with temperature changes
  • Easy to apply
  • Some spheres take too long to dissolve

3. Humboldts Secret Starter Kit Pack

This complete treatment for your plants and trees contains the following products:

  • Grow & Bloom Base A
  • Grow & Bloom Base B
  • Golden Tree
  • Flower Stacker
  • CalMag & Iron
  • Plant Enzymes

In addition, each product is formulated to cover nutrient deficiencies in different types of soils. Also, you can combine the action of two or more of these products during the different growth stages. As a result, your garden plants, crops and trees will look healthier than never before.

  • 6 Products in 1
  • Suitable for all growth stages
  • Easy to apply
  • It may cause fungus growth

4. Jobe’s Organics Rose & Flower Fertilizer

These fertilizer spikes make the application process a total breeze. In addition, each spike contains the exact amount of nutrients your flowers need. So, there’s no risk of applying the wrong dose. This product also contains Jobe Biozome, a proprietary blend of microorganisms that help restore fertility to the soil.

These spikes also improve the health of plants and make them more resistant against pests and external agents. The high concentration of potassium in these spikes also favors flower growth, making them much larger than normal.

  • Makes plants more resistant to pests
  • Returns soil fertility
  • Promotes flower growth
  • It may cause fungus growth

5. Miracle-Gro All Purpose Plant Nutrition Granules

What makes this product so popular is how easy it’s to apply. You just have to spread the granules on the soil and then use a hand shovel to mix it. In addition, the results are evident in the first week. So, you don’t have to wait too long to see your plants and flowers shine like never before.

This product is highly concentrated and just one application per month is sufficient. That means that a 2.5 lbs bottle can last months. So, you won’t have to spend more money on fertilizers for a long time.

  • Highly concentrated formula
  • Easy to apply
  • Quick results
  • Strong smell

6. Scotts Super Bloom Water Soluble Plant Food

This product has a 12-55-6 formula, which means that it’s extremely rich in phosphorus. This also makes it perfect for speeding up blooming. In addition, you can apply it directly on your flowers without the risk of burning them. Results are evident within 1-2 weeks. So, if the blooming season has taken longer than usual, this product is what you need.

The product dissolves easily in water, favoring its assimilation. In addition, it’s highly concentrated so a small dose is enough to irrigate a big garden.

  • Easy to apply
  • Highly concentrated
  • Help plants bloom
  • It may turn leaves yellow

7. Miracle-Gro Shake n’ Feed All Purpose Plant Food

This fertilizer can be directly applied on the soil. It’s absorbed by the plants immediately after applied. Therefore, the effects are evident in a short time. After a week, the colors of your flowers will look more intense. Your plants will also look healthier and stronger.

To get good results, it isn’t necessary to apply an excessive dose. In fact, a small dose has a residual effect of 3 months.

  • Easy to apply
  • Durable effect
  • Intensify the color of your flowers
  • Not suitable for growing fruits and vegetables

8. GS Plant Foods Organic Liquid Plant Fertilizer

This liquid fertilizer contains seaweed extracts, which are extremely rich in phosphorus. It can also be applied on plants, without the risk of burning or killing them. It’s also an organic and non-toxic product that doesn’t contaminate soils or water bodies. If chemical products are too aggressive with your delicate flowers, you should try this.

During the early growth stages, this fertilizer strengthens the roots of your plants. As a result, the plants can absorb more nutrients from soil, growing larger and healthier.

  • 100% Organic
  • Made with seaweed extracts
  • Non-toxic
  • Strong smell

9. BioAdvanced 8-11-5 Fertilizer

This product works like a powerful fertilizer and insect killer. These spikes come with a handy applicator that allows them to be buried deeper. That way, the formula can be better absorbed through the roots. Each spike has a useful life of 8 weeks after being buried.

This product is really effective in small garden areas. For example, on 5-inch pots. In total, there are 10 spikes to treat 10 different pots for 8 weeks or a single pot for 80 weeks.

  • 2-in-1 Action
  • Affective against whiteflies and aphids
  • 8 Weeks of nutrition and protection
  • Fragile plastic applicator

10. Miracle-Gro Indoor Plant Food Spikes

These food spikes are specially formulated for indoor plants. For best results, apply two spikes each week. This product also promotes leaf growth, making your pot plants look bulkier and radiant. This product also includes a plastic spike to easily open holes in humid soil.

In adult plants, you can also reduce the dose and still get amazing results. For example, one spike per month during summer time would be enough for a ficus or croton.

  • Suitable for indoor plants
  • Easy to use
  • Promotes foliage growth
  • The spikes tend to stick together inside the package

Tips to Buy Plants & Flowers Fertilizer

Certainly, there’s no fertilizer formula that’s 100% effective in all cases. In fact, the nutritional requirements of plants vary in their different growing stages. In addition, different plant species also have different requirements.

The same thing happens with garden plants and flowers. Usually, they need a lower concentration of fertilizer in contrast to fruit and vegetable crops. Therefore, you’ll always note that NPK numbers of fertilizers for flowers are usually lower.

However, there are other important features that can help you identify a good fertilizer for plants and flowers. In this buying guide you’ll find them all.

Types of Fertilizer

There are lots of best fertilizer for grass, plants and flowers. Some says, kind of fertilizer pollution in water. But natural fertilizer don’t make any pollution. Example, natural nitrogen fertilizer is safe for any kind of soil. Bu some new natural lawn fertilizer are not safe. So, pet safe lawn fertilizer is available in the market. That you can buy if you are a pet lover. So don’t use new lawn fertilizer unless you are confirm about that one. Because fertilizer burn lawn easily. All are not Milorganite fertilizer. Safe fertilizer meaning homemade lawn fertilizer, or straight lawn fertilizer.

In the market, more fertilizer available. Such as fall lawn fertilizer, yard fertilizer, koch fertilizer, spring lawn fertilizer, liquid fertilizer, palm tree fertilizer, bermuda grass fertilizer, scotts lawn fertilizer, lawn care fertilizer, starter fertilizer, anhydrous ammonia fertilizer, stardew valley fertilizer, and much more.


Fertilizers for plants and flowers usually have lower nitrogen concentrations than other fertilizers. Why? To understand this, it’s also important to know the effect of this essential mineral on plants.

Nitrogen plays an important role in photosynthesis. For example, when a plant receives more nitrogen, chlorophyll production is stimulated. As a result, green-leaf plants tend to show a more intense color than normal.

Nitrogen also promotes leaf growth and production. However, when the plant focuses all its energies on this process, there’s not enough energy to produce flowers. That’s the main reason why fertilizers for plants and flowers are lower in nitrogen. In simple words, the more the nitrogen, the less the flowers.

In addition, the phosphorus concentrations in this type of fertilizer can be considerably high. An example of this is the NPK number of the Scotts Super Bloom fertilizer, which appears on our top 10 list. It has a 12-55-6 formula, where phosphorus represents more than 50% concentration by weight.

The reason for these high levels of phosphorus is simple to explain. Phosphorus is a natural blooming stimulant. When its levels are high, there will be higher number of flowers with a larger size.

On the other hand, potassium, represented by the number 6 in the formula, helps to strengthen the natural defenses of the plant against pests and external agents. It also plays an important role in carbohydrate metabolism. So, it also helps plants grow taller and stronger.

NPK numbers

The NPK is the series of three numbers that represent the concentration of “nitrogen-phosphorus-potassium”. Every fertilizer on the market has its own unique NPK number. For example, “8-11-5” or “12-55-6”.

As you can see, the number in the middle, which represents phosphorus, is higher than the rest. This is the basic formula of fertilizers for plants and flowers. So, always remember this every time you go shopping for fertilizers.

In the market, you can also find balanced fertilizers, which are usually sold like “all purpose” products. The NPK of these fertilizers is usually the same number repeated 3 times. For example, “10-10-10”. Although these fertilizers can be applied to plants and flowers, it’s also true that they aren’t always effective.

For example, if the soil is naturally rich in nitrogen, applying these types of fertilizers will only increase the nitrogen concentration. As a result, the plants won’t bloom. In that case, applying pure phosphorus or a balanced mix of phosphorus and potassium will fix things.

For example, a “0-30-12” formula, where nitrogen isn’t present. These kinds of fertilizers, where any of the NPK numbers is “0” are also known as incomplete formulas.

Before applying any kind of fertilizer, it’s necessary to know the nutritional requirements of your plants and flowers. On the Internet, you can find this information specified by plant species. It would also be good to know the current composition of the soil through a soil test.

Application Mode

Fertilizers are also available in a wide variety of presentations. They can be liquid or solid in the form of powder, granules, spheres or spikes. Each variety with their own pros and cons. However, which one is the best one?


Liquids guarantee rapid assimilation through the roots. In addition, they’re very easy to apply. You can pour them pure or dissolved with water. However, liquids have a major con. They may evaporate. They can also reach groundwater and contaminate nearby water bodies.


Powders on the other hand can be directly poured into the ground or dissolved in water and applied to plants. They’re incredibly effective and durable. In addition, a small dose is sufficient to treat a large area. However, some powders tend to burn plants and flowers.


Granules can’t be applied directly on the plant. They should be mixed with humid soil. They’re especially effective in treating mineral deficiencies in the soil. On the other hand, their main problem is the long time they take to dissolve.


Spheres work the same way than granules. In this case, a permeable sphere filled with fertilizer powder is mixed with the soil. The amount of dissolved granules varies depending on the temperature. When the temperature is higher, there’s a greater dissolution and vice versa.

Spheres are more effective than granules, because they dissolve more easily. However, their permeable shells tend to take too long to degrade.


Spikes are small capsules with a characteristic pointy end that makes them easy to bury in the soil. They’re also quite effective but they may take too long to dissolve. When this happens, a thin layer of white mildew grows around the spike. As a result, fungus proliferates and then attacks the plant.


If after reading all this valuable information, you still have doubts, don’t worry. These FAQs and their answers will help to clear them all.

Q1. Why are some animals attracted to fertilizers for plants and flowers?

This commonly occurs with organic products. The peculiar fishy smell of these fertilizers could make your pets feel attracted to them.

Q2. Can fertilizer spikes cause fungus?

Yes. If the spikes don’t dissolve completely, a thin mold layer may grow over their surface. With time, the fungus passes to the soil and then to the plant.

Q3. How can I differentiate a fertilizer for plants and flowers from the rest?

First of all, check out the NPK numbers. If the number in the middle is considerably higher than the other two, it’s a fertilizer for plants and flowers.

Q4. What happens if I apply too much nitrogen to my plants?

In this case, two things could happen. The first one: the plant won’t bloom. The second one: the flowers will be smaller in a lower quantity.

Q5. Is phosphorus toxic for humans?

Yes. Ingesting large concentrations of elemental yellow or white phosphorus may cause diarrhea and vomiting. In the worst case, the subject could suffer a coma and then die.

Final Verdict

As you can see, fertilizers for plants and flowers are very different to others types fertilizers. Their high content of phosphorus is maybe their most distinctive feature. In addition, you should apply them carefully in small doses so as not to contaminate the soil and water sources. So, always follow the application instructions to avoid taking risks.

Whenever you need help to choose the right fertilizer for your plants and flowers, just follow the tips in this buying guide. If you do, you don’t have to worry about making a wrong decision.