Best Bloom Booster Fertilizers Everrr!!!

Last Updated on May 8, 2022 by Gary Stephen

Bloom boosters target to provide nutrients, minerals, amino acids, and other organic compounds. All these help cultivars to grow robust stems, luscious leaves, and exquisite flowers. So, do you want to know about the best bloom booster?

Why Bloom Boosters?

When it comes to gardening, everybody knows that you need these three essential elements: sun, water, and soil. 

Yes, you need the right spectrum of light, the right amount of water, and the right type of growing medium to grow.

But, what others do not realize is that plants need to be supplemented with the right nutrients too.

Plant nutrients are the same as nutritional vitamins for us humans. They keep us healthy, strong and enhance our well-being. The same goes for plant nutrition. 

Now, tell me what kind of grower wouldn’t want to achieve that?

In this article, we have graciously made a list of the top 5 bloom booster fertilizers in the market. We will tackle what each product offers and why they are good for your plants. Moreover, we also included guidelines to help you find the right flowering nutrients.

So, let’s get this started!

Top Picks of Best Bloom Booster Fertilizers

If you are quite in a hurry, though, please feel free to jump right into our top picks.

Our top pick for the best bloom booster:

Jack’s Classic 10-30-20 Blossom Booster

First runner-up:

FoxFarm Liquid Nutrient Trio

Second runner-up:

Miracle-Gro Water Soluble Bloom Booster Flower Food

PreviewT5 Grow LightsBest ForAvailability
Jack’s Classic 10-30-20 Blossom BoosterBest overall performance Check Price
FoxFarm Liquid Nutrient Trio Perfect flowering combo Check Price
Miracle-Gro Water Soluble Bloom Booster Flower FoodBountiful and vibrant flowers Check Price
Advanced Nutrients Big Bud Liquid Fertilizer Larger and heavier buds Check Price
General Hydroponics Liquid Kool Bloom Fertilizer Late-stage of flowering Check Price

Best Bloom Booster Fertilizers in the Market

1. Jack’s Classic 10-30-20 Blossom Booster

Best Bloom Booster Fertilizers Everrr

Jack’s Classic Blossom Booster is one of the most trusted fertilizers among growers. This professional-grade solution is already proven to boost the flowering phase. The plant food courses through the leaves and the root system to feed the plant.

The fertilizer is being formulated with a standard 1:3:2 NPK ratio. It also contains micronutrients like Magnesium, Boron, Copper, Iron, Zinc, Molybdenum, and more. This excellent balance of nutrition will not only give you more flowers, but it will also make them richer in color. 

This bloom booster is a very versatile product. It can be used in any type of growing set-ups, including hydroponics and aeroponics. Moreover, it is also suitable to apply in both indoor and outdoor types of cultivars. To further add, you can also use this as a transplant solution to encourage the new growth of roots.

Jack’s Classic is a water-soluble powder type of fertilizer. So, it is easy to use and gives you a more even application. But most importantly, it has a higher safety factor. Thus, it is least likely to burn or cause damage to the plants even when directly applied.

For most plants, the recommended mixing is one tablespoon per one gallon of water. As a bonus, the package already comes with a measuring spoon. So, it makes it a lot more convenient for you to get accurate measurements in your preparations. 

Things to concern:

Jack’s Classic Bloom Booster seems to be able to keep up and deliver pleasing results as it promises. Thus, its customers seem to love the product a lot. Its 4.7 out of 5 Amazon rating shows it well.

Magic Line:

Affordable and very easy to use.


  • NPK ratio: 10:30:20
  • Contains micronutrients
  • Water-soluble powder
  • Feeds through leaves and root systems
  • Applicable as a transplant solution
  • Suitable for indoor and outdoor plants
  • Applicable on all types of grow set-ups
  • High safety factor
  • Measuring spoon included
  • Available in 8-ounce, 1.5-pound, 4-pound, and 10-pound containers


2. FoxFarm Liquid Nutrient Trio

FoxFarm Liquid Nutrient Trio

This three-part combination features FoxFarm’s best-selling liquid nutrient solutions. The set includes the famous Big Bloom, Tiger Bloom, and Grow Big fertilizers. Each has specific functions, but all work hand-in-hand to achieve healthier blooms.

For a start, use the Grow Big liquid plant food to grow abundant and intense-colored blossoms. Its application should begin within two weeks after transplantation of the crop.

Then, as soon as you see signs of initial bud growth or flowering, switch on to using the Tiger Bloom plant food. This is a very potent and fast-acting solution. It has high levels of phosphorus, fair amounts of nitrogen, and plenty of trace minerals. All these nutrients promote the bountiful production of flowers, fruits, and buds.

To extend the flowering and fruiting stages of the plant, you can then add Big Bloom plant food later in the season. This solution is being made with 100% organic fertilizers, including earthworm castings and bat guano. 

Sounds yucky? Not really!

Cultivars seem to love this kind of stuff. It makes them develop bigger blooms, tastier fruits, and thicker seed pods. Now, isn’t that a sweet treat?

Furthermore, you can also continue to use the Big Bloom solution for the entire growth cycle. This fertilizer aids in the healing of the plant’s root systems. It can help promote nutrient cycling too. This process is vital in the ecosystem as it provides organisms the nutrients it needs to flourish as well.

Things to concern:

While Big Bloom is a 100% organic fertilizer, the Grow Big and Tiger Bloom aren’t. These two solutions contain synthetic nitrates and phosphates. So if this concerns you, then buying the entire set may not be your best choice.

Magic Line:

A detailed and target-specific blooming fertilizer


  • Grow Big NPK ratio: 6:4:4
  • Tiger Bloom NPK ratio: 2:8:4
  • Bloom Big NPK ratio: 0.01:0.3:0.7
  • Ideal for mature, late-season flower and fruit plants
  • Fast-acting solution
  • Liquid-form fertilizer
  • Sold as a set of 3 or as an individual variety
  • Available in 3-quart bottles


3. Miracle-Gro Water Soluble Bloom Booster Flower Food

Miracle-Gro Water Soluble Bloom Booster Flower Food

This bloom booster is one of Miracle-Gro’s popular range of fertilizers. The main target of this plant food is to promote abundant blooms with vibrant color features. This unique formulation is suitable to use on all kinds of blooming plants.

Miracle-Gro Bloom Booster contains high levels of phosphorus. This macronutrient is vital for the normal growth and development of the cultivars. Moreover, it also helps the plant convert other nutrients to optimize absorption.

Furthermore, it also contains the proper amounts of micronutrients. It includes traces of Boron, Carbon, Iron, Manganese, Molybdenum, and Zinc. Each contributes specific benefits but all aids in healthier growth and metabolic functioning.

This powder-based plant food is water-soluble. So, it is very safe to use, even with direct applications. This type of fertilizer will least likely cause harm or burn to your plants. Furthermore, they tend to be well absorbed much faster. Thus, enabling you to achieve more immediate results.

The Bloom Booster can be used in two different ways. You can opt to use it with a simple watering can. This is perfect for small and indoor applications. Another way is through Miracle-Gro’s garden feeder. This proprietary tool is very convenient to use, especially for more extensive outdoor gardens.

Miracle-Gro is also economical to use. A 1.5-ounce box is enough to cover a 600 square foot growing area when used along with the grow feeder. That is approximately equal to a garage room that can well fit three vehicles.

Things to concern:

Customers are quite disappointed with Miracle-Gro’s seemingly deceptive packaging. They tend to market their products in big boxes or containers. But the content in actuality, though, is not as much as you would expect it to be. Just know how much your product accurately weighs and don’t base it merely on the size of the outer packaging.

Magic Line:

An efficient and reliable bloom and color booster.


  • NPK ratio: 15:30:15
  • Contains micronutrients
  • Suitable for all types of blooming plants
  • Powder-form fertilizer
  • Water-soluble
  • Fast-acting
  • Can be either used in a watering can or with Miracle-Gro feeder
  • Available in 1.5 pounds


4. Advanced Nutrients Big Bud Liquid Fertilizer

Advanced Nutrients Big Bud Liquid Fertilizer

Bigger buds simply mean bigger yield. 

Who doesn’t want to achieve that?

Advanced Nutrient’s Big Bud allows you to make it possible. This liquid fertilizer targets to give you larger, heavier, and denser flowers. As your harvest increases, so as your stash or your monetary gains.

Although, it’s not only the weight that matters. The quality of the resin per se is vital too. Big Bud fertilizer also helps to produce more essential oils, terpenoids, and phenols. Thus, further enhancing your bud’s aroma and potency.  This plus the heftiness of the buds is a surefire way to increase your yield’s total market value.

Like any bloom booster, this also contains a well-balanced ratio of Phosphates and soluble Potash. But, the good stuff doesn’t just stop there. This fertilizer also includes a great number of amino acids. In particular, the L-forms of Tryptophan, Cysteine, Glutamate, Glycine, and many others.

These amino acids play an important role in the development of plants. These building blocks of protein support the cellular and metabolic processes of plants. Moreover, it also helps them to produce energy and transport essential nutrients. It’s actually the same as how amino acids benefit us humans. 

But unlike us, plants are not capable of sourcing amino acids nor proteins from other organisms. Rather, they have to produce it themselves. So, if amino acid supplement is what your plants need, then Big Bud got you covered. 

Things to concern:

Advanced Nutrients Big Bud liquid fertilizer is a very popular product. On the downside, though, it is quite popular too for having poor and leaky packaging. It can be due to mishandling during the shipment or just not enough seal.

Magic Line:

For cannabis buds that are not only dense but tasty too.


  • NPK ratio: 0-1-1
  • Contains magnesium and amino acids
  • Suitable to use in soil, sphagnum, and hydroponics
  • Liquid form 
  • Available in 0.25, 0.5, 1, 4, 10, and 23 liters
  • 100% money-back guarantee


5. General Hydroponics Liquid Kool Bloom Fertilizer

General Hydroponics Liquid Kool Bloom Fertilizer

Liquid Kool Bloom is another famous fertilizer manufactured by General Hydroponics. This bulking plant food is rich in Phosphorus and Potassium that come in equal ratios of 10% each. With such, it promises to stimulate abundant flowering and ripening of your cultivars. 

Liquid Kool Bloom also supplements the plants with stress-reducing nutrients. Like humans, less stress means happier plants too. As a result, it triggers them to increase their production of essential oils. Making them more aromatic and flavorful in the end.

The solution can be both used as a stand-alone or as a nutrient additive. As a primary fertilizer, it is best applied at the very start of the reproductive cycle of the cultivar. That way, you have greater chances of producing larger and heavier flowers and fruits. 

But as a nutrient additive, the application should be done towards the last two weeks of the cycle. Doing so will further boost it to bloom and ripen.

Liquid Kool Bloom is suitable to use in soil, coco, and hydroponic grow settings. In general, a teaspoon or two of the fertilizer is being mixed for every one gallon of water.  

Things to concern:

General Hydroponics is a well-established brand known for its high-quality products. And, Liquid Kool Bloom is no exemption. Customers seem to be so pleased that it garnered hundreds of 5-star ratings on Amazon. So far, no major drawbacks can overshadow the efficiency of this fertilizer.

Magic Line:

Great results at a fair price.


  • NPK ratio: 0-10-10
  • Contains magnesium 
  • Suitable to use in soil, coco, and hydroponic systems
  • Liquid form 
  • Can be used as a primary or nutrient additive
  • Available in 1-quart bottle


What to consider if you want to buy the best bloom booster fertilizers?

  • N-P-K Ratio

Nitrogen, Phosphorus, and Potassium are the three pillars of fertilizers. These three nutrients often represent the main component of plant foods. 

Nitrogen functions to prevent overstretching of the cultivars. For cannabis, you would want to start with high doses of Nitrogen first. This will encourage vigorous growth of the plants. Levels are then eventually weaned off as it comes near the harvest period.

Meanwhile, Phosphorus and Potassium both help crops to optimize their bud formation. It also assists in the plant’s enzymatic actions. Opposite to Nitrogen, higher doses of P & K are much needed during the early and mid flowering stages. During the later phase, most growers terminate Nitrogen but keep P & K only.

That said, the N-P-K ratio varies depending on the certain phase of the flowering cycle. So, be aware that you might need different fertilizers to cover your plant’s entire blooming needs.

  • Organic vs Synthetic Fertilizers

Organic nutrients are naturally a slow-release fertilizer. That is because the nutrients rely on other microorganisms to breakdown. Thus, the process takes a while before the plants can absorb the components. 

But in that same sense, it is also safer to use because it lessens the risk of overfeeding and burning the cultivars.  On that note, organic fertilizer is suitable to use by novice growers since it is more forgiving.

On the other end, there are synthetic nutrients. These fertilizers are being made from chemically-chelated nutrients. Its biggest advantage of using inorganic plant food is precision. This type of solution has the capacity to deliver exact ratios of N-P-K and other minerals. Thus, ensuring you get better control over your feedings. 

Unlike the organic, synthetic nutrients are not dependent on microbes. Thus, it is much readily-available for plants to absorb. It’s both a good and bad thing though. That is because it increases the likelihood of overfeeding and burning your cultivars. Considering the technicalities, synthetic nutrients are more apt for professional uses.

  • Forms & Preparations

Bloom boosters are often available in powder or liquid form. Either way, always take the precaution not to apply it directly to the plants.  There are some that require proper dilution first. Dissolving the nutrient in water makes it a lot easier for the plant and its root system to absorb.

  • Read the Label

Make reading a habit!

Different fertilizers have different nutrient contents, indications, preparations, applications, and more. It is not a one-size-fits-all kind of thing. Even if the solution contains the same N-P-K ratios or from the same brand, it doesn’t mean they’re already the same.

Take some time to read the guidelines the manufacturer had provided. This will help you get a better understanding of the product and its proper usage. Remember, once the nutrient is being administered, there’s no turning back already. It can either benefit or destroy your plants. So, try to learn about the product as much as you can to avoid careless mistakes.

Wrapping Up about The Best Bloom Booster Fertilizers

Bloom booster fertilizers are great supplement solutions for your cultivars. It targets to pump-up the size, weight, and density of the harvest. At the same time, it will also enhance the very quality of the bud itself. In that manner, your yields will not only be heavy but of better value too.

In this article we’ve named our top five picks of the most trusted products by growers. They are being manufactured by reputable brands in the industry. Thus, you can be assured of its performance and reliability. So, all you need to do is sit back and watch your babies grow!

Gary Stephen
Gary Stephen

Hi, I am Gary Stephen. I have been gardening for a long time. Gardening gives us much benefits and pleasure. Many of us desire to have a garden, but it cannot fulfill the desire for the proper guide or instruction of gardening. So, I am eager to help them. For this purpose, I have developed the website to make a garden with the proper guide. So, you will get me beside you if you want to know anything about gardening.