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Best Fertilizer For Hydrangeas – A Detailed Guide For Gardening

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Hydrangeas have become the favorite choice of most gardeners for their large unique heads and long blooming periods. Another advantage is its good tolerance and ease of care. Depending on the seed, each flower jazzes up your garden with different colors. 

However, it requires the proper care, especially fertilizer, to achieve the most impressive appearance. Besides, this nutrient source nourishes a healthy root system. It is necessary to form a solid support for the massive upper.

Do not just grab a product by accident. Dive into this article to find the best fertilizer for hydrangeas and learn important considerations when shopping for this item at Growingherbsforbeginners.com.

Comprehensive Review: Best Fertilizer For Hydrangeas

Though best fertilizer for hydrangeas is a specific product that caters to a certain niche, its variety sometimes confuses even the experienced. If you are in a hurry, dive into this section to find out the top best fertilizer for hydrangeas options in just a few minutes.

RTS Home Accents Rainwater BarrelBurpee Bone Meal Fertilizer
Good Ideas IMP-L50-SAN<br /> Miracle-Gro Acid-Loving Plant Food
Good Ideas RW65-GRN Rain WizardJobe's Organics, 09364, Soil Additive
Enviro World EWC-10 FreeGardenJR Peter Blossom Booster Fertilizer
Enviro World EWC-10 FreeGardenJobe's 9365 Additive De-Acidifier
Enviro World EWC-10 FreeGardenEspoma UL30 Organic Soil Acidifier Fertilizer

#1. Burpee Bone Meal Fertilizer – Best For Strong Root Development


  • Type: Granules
  • Properties: Organic
  • N-P-K Ratio: 6-8-0
  • Size: 3 pounds

Burpee Bone Meal Fertilizer

Burpee Bone Meal was meant for complementing the trade-off of this gorgeous flower – promoting root growth.

As mentioned above, the special feature of the hydrangea is the large flower head which sometimes puts pressure on the upper bottom. Your caregiving efforts may go down the drain if the ailing stem suddenly breaks off before the flower is in its full swing.

No mineral is more powerful than phosphorus and calcium to solve this problem. Luckily, you can find all these essentials right in Burpee fertilizer, especially with the outstanding phosphorus proportion than the other two (6-8-0).

With a slow-release formula, it breaks down to nourish your garden throughout the growing. Like humans, calcium nourishes from deep within the roots to improve stability in every organ. While building a strong base, phosphorus content stimulates lush growth, especially flowering.

As indicated by the manufacturer, you can take advantage of Burpee at any time before the growth season. In particular, it is the ideal choice for new plants. 

However, we recommend applying as soon as possible, as early as spring arrives. These favorable conditions give the plants enough time to absorb the nutrients and keep them looking their best.


  • Great source of soil nourishment
  • Prevent rabbits
  • No burning problems
  • OMRI listed, organic and safe


  • Bad smell

#2. Miracle-Gro Acid-Loving Plant Food – Best Value For The Money

Miracle-Gro Acid-Loving Plant Food



  • Type: Granules
  • Properties: Organic
  • N-P-K Ratio: 30-10-10
  • Size: 1 pound

Going in line with the reputable quality of Scotts, Miracle-Gro Plant Food has become the first choice for hydrangeas among hundreds of products. It strikes the most balance between quality and price.

Due to the unique formula, it is absorbed through both the roots and the leaves. This granular food brings fast action and unexpected results to your garden. After just one application, you can expect large, vibrant flowers and luscious leaves. Believe it or not, 1 pound of this fertilizer can cover up to 400 square feet, which is more than sufficient for your flower yard.

By offering iron and acid, this product provides food for all summer months. In 30% nitrogen, up to 27% is extracted from urea, which increases the acidity. It deepens the flower color and promotes optimum growth. Miracle-Gro is a perfect kickstart for pre-growing blooms. 

Besides, it is a savior for underdeveloped roots. The triple amount of nitrogen compared to the common standard thickens stems. As a great companion, this option nourishes and strengthens the upper system. It can be said that this fertilizer leads to a sturdy pedestal to keep up with the intense vitality of the flower heads.

Another plus for the Miracle-Go is the easy control. Instead of a spray bottle, feel free to mix it with water in a one-gallon bucket and pour the liquid around the plant. It saves time and effort on care while achieving a good outcome. Your tree comes back to life, sheds fewer leaves, and begins to bloom.


  • Work on many parts of the plant
  • Multi-effect: stimulates flowering and strengthens roots
  • Easy to mix with other composts


  • Small volume in one package 

#3. Jobe’s Organics 09364 – Best Organic

Jobe's Organics, 09364, Soil Additive


  • Type: Granules
  • Properties: Organic
  • N-P-K Ratio: 0-0-0
  • Size: 6 pounds

A perfect recipe for blue hydrangea – That’s how we describe Jobe’s Organics 09364. Small amounts of sulfur available in this product promotes protein production for acid-loving plants. 

At the same time, This fertilizer increases the acidity of the soil, reducing the pH to the ideal level of 5.5 or lower. This adjustment helps to adjust the color of the hydrangea to the most loved one – blue.

In addition, the amount of gypsum provides an excellent source of vitamins and enzymes. It is a great support to improve the stiffness of the trunk. These nutrients also enhance resistance to disease and keep your garden growing in a healthier state.

The great thing is that these amazing benefits work due to the 100% natural ingredients. In other words, it takes care of the plants without releasing any harmful chemicals into the environment. This option helps gardeners avoid tree burns with flowers due to the wrong fertilizer.

On the downsides, it seems that some of the batches are shipped without the quality control of the packaging. We’ve received an improperly sealed container with uneven ends. Some particles fell out of the bag and dirty the package. It seems not to be a common case, though.


  • Fast-acting
  • Safe ingredients
  • Multi-purpose
  • Easy to apply


  • High price range

#4. JR Peter Blossom Booster Fertilizer – Best For Boosting Bloom

JR Peter Blossom Booster Fertilizer


  • Type: Water-soluble
  • Properties: Inorganic
  • N-P-K Ratio: 10-30-20
  • Size: 1.5 pounds

If your hydrangea bushes experience no flowers despite growing green, it is time to look for a dedicated stimulant. That’s why we mention JR Peters in this article to fulfill this demand.

As shown in the ingredients table, this product contains triple phosphorus, pushing bloom promotion to a new level. The science behind is that phosphorus stimulates energy transfer, thereby fostering the flowering process. Dissolve it in water, pour the liquid around the base, and wait for a positive change in just a few days.

Besides this main function, JR Peters also provides several other trace minerals (iron, magnesium, zinc, etc.)  that improve healthy growth. In this respect, it may take about four months to see visible results, but it is totally worth your wait.

Another controversial feature is the container with its large size. Some people find it convenient to take preparatory steps before applying. On the contrary, a small group of people complains that it is cumbersome for small gardens.


  • Precise application with a measuring spoon included
  • The addition of micronutrients
  • Suitable for all stages of plant development


  • Fails to work with some soil conditions

#5. Jobe’s 9365 Additive De-Acidifier – Best For Pink Hydrangeas

Jobe's 9365 Additive De-Acidifier


  • Type: Granules
  • Properties: Organic
  • N-P-K Ratio: 0-0-0
  • Size: 6 pounds

Highly acidic soil makes you fail to keep flowers pink. So if you notice some blue shades, fix it immediately with the Garden Lime version of Jobe’s. First, carry out your soil test and let this organic granular fertilizer do its job.

Some people see hydrangeas as a “litmus paper” to test soil properties in an adverse principle.  The flowers will turn blue in acidity and red if planted in alkaline soil. So in case you just want the flowers to lean towards pink, this soil additive, which adjusts the pH between 6.5-6.8, comes into effect.

That’s also how this product works. It helps flowers absorb nutrients and grow at their best. The greatest part is that the natural ingredients finish their job without harming the environment, pets, and children.

Besides, due to the essential nutrients, it keeps your whole garden vibrant all spring. Most customers are also impressed with the fast flowering rate after only three days of use.


  • Natural source of nutrients
  • Easy installation
  • Excellent pH adjustment


  • Limited distribution

#6. Espoma UL30 Organic Soil – Best For Blue Blooms

Espoma UL30 Organic Soil Acidifier Fertilizer


  • Type: Granules
  • Properties: Organic
  • N-P-K Ratio: 0-0-0
  • Size: 30 pounds

Gardeners often favor blue hydrangea over other shades, but it is not an easy task to lower the pH below 6. This case requires a balance of acidity and soil fertility.

Luckily, we have got the Espoma with multi-function to overcome these challenges. It creates a perfect recipe for a blue transformation in your garden. Instead of aluminum sulfate, 30% sulfur fully promotes this amazing benefit. It means there are no harmful side effects such as aluminum toxicity that can stand in the way of your gardening.

In addition, some people are concerned about poor absorption if the pH drops below the acceptable level. However, this desiccant solves this difficulty by feeding your garden. 

It provides nutrients and minerals to nourish the hydrangea. Most notably, it commits to a steady flow for about two months. In other words, it is redundant for regular fertilizing or adding some other product.


  • Reach the ideal pH for blue flowers
  • Promotes growth under poor conditions
  • Long-lasting effect
  • Large volume, economical


  • Poor-quality container

Buying Guide For A Proper Hydrangeas Fertilizer


Fertilizer for hydrangea comes in three main forms: liquid, granular, and sparkle. Pay attention to this part, as each has its distinct benefits.

Liquid Fertilizer

Manufacturers serve customers with two common types: concentrate and ready-to-use. Despite the difference in usage, the general benefit of liquid forms is rapid absorption.

Instead of dividing, it goes straight to the roots and from deep within. Besides, it absorbs through leaves and enhances plant nutrition. On the downside, excess watering or heavy rain may wash away your efforts.


As shown above, this type dominates our list. It is not a bias at all but because of its popularity. Recently, a niche trend became popular in this industry – time-release granules. As the name implies, it breaks down slowly to provide a boost of nutrients for a longer period. However, it takes a while before it comes into effect.

Fertilizer Spikes

Here is another choice if you prefer a slow-release fertilizer. To distinguish, people often consider the characteristic shape of each option. This one looks like stiff spikes from being condensed. Some gardeners claim that its dissolution lasts for about 2-3 months, slightly longer than the option above.


Instead of texture, some people are interested in this factor, or in other words, the composition of fertilizers. Today, most products contain chemical nutrients, while a few are made from natural ingredients. 

We cannot decide the winner in this comparison. It all boils down to personal preference to choose the most suitable one.

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Manufacturers use synthetic nutrients and formulate fertilizer in the lab. The most outstanding feature of this form is that it almost meets all the gardener’s needs, such as stimulating beautiful blooms, increasing acidity, etc. Slow-release types also often fall into this category.


Some of the basic ingredients for this production include poultry manure, vermi-compost, or compost. One of the clear drawbacks is its milder effect than chemical substances. 

However, organic fertilizers offer distinct benefits besides nourishing the plant, such as fortifying drainage.

N-P-K Ratio

This factor representing the nitrogen, phosphorus, and potassium content determines the development of your garden. 

Most people use multi-purpose products for basic purposes, such as promoting growth and bloom time. This option contains an equal ratio of three substances. Alternatively, it is highly recommended to double the phosphorus amount (usually 10-20-10) to increase the size and number of hydrangeas.

Soil Type

Like other plants, good drainage and adequate organic matter are the best conditions for hydrangeas growth. Therefore, it requires fertilizer or dry leaves to improve the quality of clay or sandy soil. It lends an ideal environment for the flowers to bloom at their best.

Before choosing a fertilizer, the mandatory step is to carry out the soil tests yourself or bring samples to agricultural extension offices. The results reflect exactly what you should do to achieve balance.

Color and pH Level

The huge pH deviation leads to a color change in the flower heads. Therefore, another use of fertilizers is to adjust the soil quality, thereby creating a variety of flowers.

The pH scale ranges from 0 to 14, with the middle point representing neutral. A level of 7 or less indicates acidity, while the opposite direction is alkaline. Based on your preferred hue, you can choose a proper soil additive or fertilizer.

  • Neutral: Hydrangea comes up with pink blooms. Depending on several other factors, they determine the degree of lightness.
  • Alkaline: The upper level of the pH scale produces a light pink color.
  • Acid: In about 6, the hydrangeas may turn purple. Once the pH drops below this level, your flower garden is flooded with an eye-catching shade of blue.

How To Take Advantage Of Hydrangeas Fertilizer

How To Fertilize

After choosing the right treatment for your hydrangea, your mission has not come to an end. You also should learn how to get the most out of these products through proper use. To summarize, it includes the following basic steps:

  • Carry out pH test for soil health with specialized tools
  • Based on the results obtained, it is possible to make some changes if you aim for a specific color. 
  • Fertilize before the blooming stage (details are mentioned below).
  • Add more water for dry weather.

Needless to say, each product works in distinctive ways depending on its form. Apart from the manufacturer’s instructions, here are a few things to keep in mind.

When it comes to spike fertilizers, there is no other way but to push them into the ground around the area of the hydrangea. Meanwhile, most experts recommend sprinkling granules around the tree base and mulching afterward for best results. 

Remember to water, so the molecules dissolve into the soil and release nutrients to the roots. If you go for the slow release option, lightly cover the top with a layer of soil to activate the fertilizer.

The liquid options often require dilution before use. One striking difference is that they can come into contact with leaves besides spraying at the stump.

Essential Notes: Pay attention to the dosage used. A surplus burns leaves, encourages stem growth instead of beautiful flowers or kills the plant. If you notice yellowing leaves, promptly add liquid iron or a quick-acting fertilizer to correct the situation.

When To Fertilize

Most experienced gardeners recommend applying caring methods in mid to late spring. Besides, you should follow the manufacturer’s recommendations to get the best out of your product.

August is never the ideal time to fertilize as your garden is about to hibernate. Your act of ignorance weakens resistance to inclement weather and facilitates the entry of cold air into new leaves. Additionally, adding a multi-purpose dose at the end of cold winters gives better results.

In warm areas, application in May or July is sufficient for an entire season. Dosage is reduced to 1 time between June and July in colder climates.

For time-release products, manufacturers suggest reapplying every three months. This level increased to once every 1-2 weeks to maximize the effects of the remaining ones. 

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Is It Possible To Fertilize Hydrangeas While Blooming?

It is safe to add fertilizer during blooming. However, the best time to fertilize hydrangeas is after their dormant stage. At their peak growth time, usually spring, they require abundant nutrients to start a new cycle.

How Often Should I Fertilize Hydrangeas?

The general rule of thumb for fertilizing hydrangeas is once a month, from March to July. All efforts to add nutrients should stop from August until the end of hibernation.

In addition, the frequency of feeding depends on your area and the product types. If it is a slow-release option, the interval between two applications usually lasts longer. Hence, it is best to follow the manufacturer’s instructions.


We believe our list has given you an in-depth look at the best fertilizer for hydrangeas. Among them, Miracle-Go ticks all the boxes to bring a perfect result for gardeners as the above classification. However, the rest of the products really work when they treat some of your flowers’ specific problems.

If these offers are not your final destination, buying tips from experts may help. A wise consumer should know all the involved factors to make the best decision for hydrangeas.

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