We, plant lovers, can all agree that hydrangeas are one of the most beautiful flowers a gardener can have in his garden.

Because of that today we wanted to share with you our top 8 fertilizers for hydrangeas and also give you some detailed advice on how to use fertilizers for hydrangeas.

Whether you like pink, blue and even white hydrangeas, stick around to see what products you can use so your flowers look even more stunning.

The 8 Best Fertilizers for Hydrangeas

By giving you a list of these 8 fertilizers you can compare their specs and see what fits your garden best and also see what the market offers.


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✓All-organic, no added chemicals
✓18lb bag will last you well over a season
✓Easy to use, doesn’t need additives

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Espoma UL30

✓High acidity levels
✓Large 30lb bag
✓Recovers exhausted hydrangeas

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Dr. Earth

✓Water storage
✓4lb pack, polybag
✓Prolonged feeding
✓Organic nutrient blend

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✓5lb compact bag
✓Mix of micronutrients
✓1 dose = 2 weeks of feeding

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Jobe's Azalea

✓10 spikes in each package
✓Doesn’t need frequent change

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✓75lb package
✓Comes in pellets
✓Easy to apply and mess-free
✓Turns hydrangeas pink

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J R Peters

✓5lbs package
✓High nutrient-value
✓Maintains deep blue color

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✓4lb bag enough for the whole season
✓Easy to use and mix with composts
✓Makes hydrangeas grow rapidly
✓Ensures strong roots and flush blooms

1. Espoma HT18 Holly Tone

Manufacturer’s specs, features, and details:

If you want to kick it up a notch and make your garden look more professional, then you should consider using the big guns – Holly Tone fertilizer.

This 18lb bag is enough for a whole plantation of hydrangeas to get fertilized the whole season and can also be used for other acid-loving plants.

Also, if you’re someone who likes to keep the garden organic, then you might want to give this fertilizer a shot because it doesn’t contain added chemicals.

It contains proprietary Bio-Tone beneficial microbes which will make your hydrangeas flourish and keep the healthy even in the colder months.

This fertilizer does what regular fertilizer can’t – it prevents the leaves from yellowing, makes the roots stronger and it prevents the attack of some nasty pests.

You can add this fertilizer every 2 or 3 weeks depending on the size of your hydrangea garden and you can mix it with most kinds of composts as well.


  • Ideal for acid-loving plants
  • Keeps your garden all-organic
  • Doesn’t need to be added so often
  • Keeps the hydrangeas healthy and the petals vibrant


  • A bit pricey

Bottom Line:

This fertilizer is great for most gardeners who don’t even have hydrangeas because it’s all-organic and won’t damage other plants as long as they can grow in acidic soil.

Because of the versatility of this fertilizer, it might be your second-to-best choice if you want your garden to look fabulous.

2. Espoma UL30 Organic Fertilizer, 30 lb

Manufacturer’s specs, features, and details:

This 30lb bag of organic fertilizer is enough to last you well over a season depending on the size of your garden.

Because it’s organic and has low pH levels this fertilizer is ideal for growing hydrangeas and blueberries.

If your hydrangeas are struggling to grow or they are being attacked by pests this fertilizer is going to solve your problem.

The high acidity of the fertilizer stimulates growth and also helps wear off any nasty critters and those annoying weeds.

Also, the sulfur in this fertilizer turns your hydrangeas into a beautiful deep blue color or, if they are pink, it will turn them purple.


  • Great for saving your hydrangeas
  • The bag will certainly last you a season, maybe even two
  • It’s cheap considering the quantity and quality
  • Decreases the chance of pests and weeds


  • Because of the acidity levels, it can turn your pink hydrangeas purple so be careful

Bottom Line:

There’s not much to say about this fertilizer except that for many gardeners it has been a life-saver and people usually use it when they have trouble growing their hydrangeas.

And even though this might not be the most premium fertilizer on the market, the price matches the quality so you do end up getting a bang for your buck.

3. Dr. Earth 703P Organic

Manufacturer’s specs, features, and details:

This 4lb bag of Dr. Earth fertilizer is ideal for people who don’t want to deal with storing fertilizers at it is in a polybag offering easy access.

The fertilizer is all-organic and is a hand-crafted probiotic blend containing 7 different microbes ideal for any type of plant that needs plenty of nutrients.

With this fertilizer, you won’t need to feed your hydrangeas as often and it will make the roots stronger and the blooms more vibrant.

Another thing to mention is that this fertilizer stores water in case of drought so your hydrangeas can survive even the hottest of months.


  • Easy to store and to use because of the polybag
  • Will last you longer than a bag of fertilizer twice the size
  • Holds water and prevents the soil from drying out
  • Gives important nutrients to your hydrangeas


  • A bit pricey

Bottom Line:

Because the packaging and the fertilizer are both practical there’s a fair chance that this is going to be for gardeners who don’t like to put too much effort into good results.

And good results are what this fertilizer will give you besides all of the organic nutrients and water storage so it certainly is worth the price.

4. Miracle-Gro Plant Food

Manufacturer’s specs, features, and details:

Miracle-Gro works wonders for hydrangeas because of its fast-acting properties making your plants grow insanely fast.

This 1.5lb package can feed about 600 square feet and will surely last you a month because you only need to apply it once every two weeks.

If your hydrangeas are looking a bit beat-up, then you can treat them with this fertilizer every week and you’ll see how fast they spring back to life.

The great thing about this fertilizer is that it can be mixed with other composts so that you get just the right mixture for turning your hydrangeas into true beauties.


  • Stimulates faster plant growth
  • Versatile for mixing with other composts
  • Economical and efficient
  • Works wonders for hydrangeas in rough shape


  • Doesn’t have any

Bottom Line:

Because you can use this fertilizer as an additive to other fertilizers and composts, this is one of the best fertilizers you can have at hand.

Also, the Amazon ratings speak for themselves and nearly all of the gardeners who tried Miracle-Gro are thrilled by its effect.

5. Jobe’s Azalea, Fertilizer Spikes

Manufacturer’s specs, features, and details:

This fertilizer is a bit different than the others we reviewed because it comes in the form of spikes that you put in the soil and then combined with water to activate their effect.

The package comes with 10 spikes and because they don’t have to be changed as frequently as other types of fertilizers they will last you enough for the season depending on how many plants you have.

Ideally, you should put one spike for each plant’s diameter and this ensures that your hydrangeas get enough nutrients and start growing faster.

The good about this fertilizer is that, unlike the pelleted fertilizer which can be washed away by rain, it holds all the nutrients near the roots and can’t be affected by weather conditions.

By just making sure you’re applying enough water, you’ve finished the job in terms of fertilizing if you use these amazing spikes.


  • Easy to use and long-lasting spikes
  • Keeps all the nutrients near the roots
  • The slow-release formula ensures that the plant food is distributed evenly
  • Mess-free and easy to store


  • If you have a large garden you’ll need a bigger package

Bottom Line:

These spikes are mess-free and take up little to no room in your shed so they are for the people who either don’t have enough time for their garden or don’t like the hassle of fertilizing so often.

All in all, even though these spikes are a bit pricey, they are also much more practical than regular fertilizers and get the job done much more efficiently.

6. Bonide Bailey’s Hydrangeas Pellets

Manufacturer’s specs, features, and details:

This fertilizer comes in pellets and is meant to be placed on top of the soil to give it more minerals and raise the acidity levels.

It can raise the pH levels by up to 7.0 which is an environment where hydrangeas thrive in but it also sweetens the soil resulting in pink hydrangeas.

So the main purpose of this fertilizer is to give your hydrangeas a pink color and is meant to be used as an additive rather than plant food as it doesn’t have as many nutrients as regular fertilizer.

You can still mix it with some nutrient-rich compost and you’ll have beautiful pink hydrangeas that won’t miss out on any important nutrients.


  • It’s quite easy to apply, you just pour it on top of the soil around your hydrangeas
  • Raises the pH levels and makes the soil more acidic
  • Turns your hydrangeas pink
  • Goes well with other fertilizers


  • Isn’t as effective in feeding plants as other fertilizers

Bottom Line:

If you want variety in your garden then you can simply use this fertilizer on one row of your hydrangeas and you’ll end up with a mosaic of pink and blue hydrangeas.

Also, you can get blue and pink blooms from one flower of hydrangeas by setting the pH levels of the soil at about 6.0 and this fertilizer will help you achieve that.

So all in all, this fertilizer is for gardeners who want to bring in some variety in their garden and who have time taking care of their plants.

7. J R Peters7-3-3 Hydrangea Fertilizer

Manufacturer’s specs, features, and details:

Last but not least we have this heavy-duty fertilizer from J R Peters.

If you want all the best nutrients, minerals and microbes for your hydrangeas and also want them to be deep blue then this stuff is for you.

This fertilizer is water-soluble, has plenty of microbes and contains aluminum sulfite which will make your hydrangeas grow lush blooms and make their blue color more vivid.

Also, if your hydrangeas are in rough shape, this fertilizer can be used to bring them back to life and make the flowers more vibrant and your flowers stronger than before.

Even though the package is just 1.5lbs it can last you for the entire season and should be applied once every two weeks.


  • Contains aluminum-sulfate which feeds your hydrangeas
  • Can recover beat-up hydrangeas
  • Makes the color more vivid and the blooms bigger
  • Easy to apply and economical


  • Doesn’t have any

Bottom Line:

This is one of the best fertilizers on the market if you want a simple and effective way to achieve deep blue and big flowers on your hydrangeas.

It may be a bit pricey but in the long run, it can save you money by not having to buy large quantities of regular fertilizer to achieve the same or even worse effect.

8. Scotts Company Plant Food, 4-Pound

Manufacturer’s specs, features, and details:

The Scotts Company fertilizer comes in a 4-pound package enough for a whole season of fertilizing hydrangeas.

It’s quite acidic which hydrangeas love and this fertilizer provides nutrition straight to the roots and makes them stronger.

You want to use this fertilizer every 1 or 2 weeks and you want to add 1 teaspoon of Miracle-Grow in a gallon of water.

You’ll see that your hydrangeas are going to develop luscious blooms and grow fast like weeds.


  • Great for camellias, hibiscus, hydrangeas, and orchids
  • Stimulates faster growth
  • A go-to fertilizer for transplantation
  • Price matches the quality


  • The acidity of the fertilizer can kill your other plants, so plant your hydrangeas separately

Bottom Line:

If you want a fertilizer that does the job and doesn’t like mixing different composts together to make the ideal conditions then this fertilizer is for you.

And don’t take it from me, about 85% of Amazon reviews praise this fertilizer for its great results.

What is the Best Fertilizer for Hydrangeas?

Hydrangeas thrive in acidic surfaces and they also need soil that has well-drainage and light so that the water can go straight to the roots.

They also prefer soil that is full of nutrients and microbes which act as food for them and of course if you can all-organic is the way to go.

Some natural fertilizers such as bark, compost, and leaves are always a good idea to implement if you want to give your hydrangeas nutrients and also retain water from the soil.

Choosing the right fertilizer depends on the type of soil you plant your hydrangeas in so for example, if you have clay-like soil, using fertilizer will definitely help bring some acidity to the environment.

Also, using fertilizers helps the roots become stronger and your hydrangeas healthier and flush as well as helping them grow faster.

Organic fertilizer is always a great option if you don’t want to use chemicals in growing hydrangeas and also you can even mix it with your own compost to give them a bit more nutrients.

Slow-release fertilizers are the most common fertilizers found on the market and they slowly introduce nutrients for your plant and reduce the chance of fertilizer burns.

Fast-release fertilizers feed the plant faster but need to be applied regularly and must be handled with care to avoid over-saturating the plant with acidity.

Also, some fertilizers are more acidic then others and they can turn your hydrangeas in different colors.

For example, if the acidity of the soil is above 6.5 pH then your hydrangeas can turn pink and if it is lower than 5.5 pH your hydrangeas are going to be deep blue.

Because there are several types of fertilizers, the best one can’t be precisely pinned down to be the absolute best for hydrangeas but if it contains the necessary properties than it’s a good choice.

When to Fertilize Hydrangeas?

How often to Fertilize Hydrangeas?

Ideally, you should start with the fertilization of your hydrangeas in the late spring and then amp up the doses when the hydrangeas are leafing.

Fertilizer burns can occur especially if your fertilizer is too acidic or you apply more fertilizer than the plant can handle.

So if you plant your hydrangeas in the early spring you can expect them to start leafing in the mid-to-late spring and then you want to start using the required doses.

However, this all depends on the variety of your hydrangeas, the climate of your region and also the type of fertilizer you use.

Make sure to read the instructions on the fertilizer packaging and see if it is suitable for your hydrangeas or just use a pH tester to do the same thing.

Re-blooming hydrangeas with fertilizer is a good idea and you don’t need to worry about the flowers falling off as they will bloom again later on.

It is a common rule that you should fertilize your hydrangeas at least once a month but some fertilizers can last twice as long and others last for about a week so make sure to get something suitable for you.

How often to Fertilize Hydrangeas?

Every fertilizer is different and you do want to follow the instructions on the package but a general rule is once a month.

However, you need to know when spring and summer start in your region because in moderate climates where there are all 4 seasons fertilization starts in March.

If you live in a warmer climate where there isn’t much difference between spring and summer or if your region is colder, then the “once a month rule” isn’t going to help you.

Because different fertilizers have different formulas, there are 3 common types of fertilizers based on applying frequency.

Some of them should be applied once in 30 days or even 2 months and they contain a special formula (release slowly) meaning that you don’t need to fertilize your hydrangeas that often.

Opposite, fast-acting formulas, as the name implies, start doing their job faster but when using them you’ll need to add more fertilizer frequently.

Another type of fertilizer is designed to be applied once in 2 weeks or once a month and they are usually a happy medium between the first two types.

You’ll have to choose the right fertilizer formula depending on how much time you have for your garden.

If you spend a lot of time in your garden, then the fast-acting fertilizer is for you, and if you don’t have much time then use a slow-release formula and you’re done.

All in all, it is better to accidentally forget to re-fertilize your hydrangeas then to constantly bombard them with fertilizer as they can get damaged quite easily.

How to Fertilize Hydrangeas?

How to Fertilize Hydrangeas?

People like to plant hydrangeas because they are low-maintenance compared to other flowers, for example, roses or orchids which are a pain to care for.

However, with any plant, you need to take special care and that’s where fertilizers come into the mix.

Even though you don’t need to use fertilizers for your hydrangeas if you use compost with the right nutrients and acidity levels, you can use fertilizers to boost the growing speed.

If you eventually opt to use fertilizers then you should see what fits your hydrangeas best because there are 3 main types of fertilizers.

The first type is a liquid fertilizer that is applied onto the plant with a sprayer or poured in the soil by a watering can.

These kinds of fertilizers are easy to use and relatively mess-free, and often times are going to have a fast-acting formula so you’ll have to use it regularly.

The second is a pellet or solid fertilizer which is applied by scooping the pellets and adding them around the plant.

It’s great for retaining water and keeping your hydrangeas well-fed and hydrated while also making the soil more acidic so that they can grow faster.

The final type is fertilizer in the form of spikes which you plant into the ground about an inch deep and then you water the soil.

What these spikes do is actually slowly releasing nutrients and microbes making them the easiest form of fertilization and they also last longer than other fertilizers.

Whichever type you choose is going to have nearly the same effect in feeding your hydrangeas so you might want to choose the fertilizer that has the most nutrients.


We hope that you’ve liked our review of the fertilizers and that you found just the right one for your hydrangeas garden.

If you have any suggestions or just want to share your experiences with some of these products, please leave a comment below.

Happy gardening!

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