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When and How to Fertilize Blueberry Bushes? (Which Fertilizer To Use)

Blueberries, the small amount of happiness gets their color from anthocyanins which is a type of antioxidant.

Blueberries are high in potassium and vitamin C which is why nutritionists and dermatologists can freely recommend using the fresh and healthy cup. A single cup of blueberries has only 81 calories.

Fun Fact: The Blueberry in the Victorian era symbolizes flawlessness and affability in life and personality. Interesting, isn’t it?

Fertilizing isn’t a recommendation, but a duty to get the healthy and nourishing plant which in this case is blueberry. In a short amount of time from Spring (Spring is preferable) to Summer, the fertilizer needs to be absorbed thoroughly.

Let’s find out in detail exactly when and how the process should be done. Plus, I’ll provide information on the importance, and side effects of overfertilizing. Just keep reading.

When to Fertilize Blueberry Bushes?

The best time to fertilize the blueberries are in the early spring and late spring, so they will enter the summer healthier. The reason behind it is that in high temperatures, the blueberries cannot deeply infiltrate and absorb the fertilizer.

Before starting all this fertilizer process, check the soil pH. You can simply test it at home with a kit. The pH in the soil needs 4.3 to 5.5 levels.

How To Fertilize Blueberry Bushes?

  •  Apply 2.5–5 lbs per 100 square feet to new gardens to prepare them, and carefully blend them into the top 3′ inches of soil. 
  • Prepare a transplant hole for young berry plants (up to two years old), and mix 1/2 cup of the soil with the backfill. 
  • Fill in the area around the new plant with modified soil and water it thoroughly. 
  • Use 1 cup per plant in the early spring, mix into the soil’s surface, and thoroughly water it to feed established berries.
  • When blossoms appear, apply again, and then in the fall, use half the recommended quantity.

Best Fertilizers For Blueberry Bushes?

It’s quite significant to test beforehand the acidity of the soil. Blueberries prefer more of an acidic type of soil which happens to be between 4.0 and 5.5. The soil test will determine the lack of nutrition.

Here are some of the greatest fertilizers

1. Down to Earth All Natural Acid Mix Fertilizer

 Down to earth is a natural fertilizer that is mixed with acidic fruit fertilizers such as camellias, hydrangeas, evergreens, blueberries, raspberries, strawberries, potatoes, and other plants that need a low pH.

There is a 1 or 5-pound box option and the formula is a 4-3-6 ratio. 

It is preferable to apply in the spring times, but in the case of Fall application, it will help the root growth even more than usual and increase the resistance, especially in winter times.

You can use this acidic fertilizer for blueberries in a container, vegetable garden, and houseplants.

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2. Grotek Final Blueberry

Grotek comes in liquid form with a volume of 135.26 fluid ounces. As you already know, the best appliance for the liquid type of fertilizers is spraying.

Be careful to spread the fertilizer evenly. It is formulated to get rid of excess salt and protect the blueberry plant from possible nutrient deficiency. 

Plants usually absorb more nutrients than required. By using this formula, you convert the gathered salts into an improved harvesting time. Plus, the nice smell and aroma cause no harm to animals and pets.

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3. Espoma Organic Berry-tone

The wide range of use of Berry-tone organic fertilizer is feeding all types of berries involving blueberries, strawberries, raspberries, and blackberries.

It’s true and rich fertilizers with organic content. The formula is 4-3-4 mixed together with 5% of sulfur. It doesn’t include any harmful or toxic ingredients like sludges.  

Use Espoma Organic Berry-tone fertilizer only twice every year (preferably in the early spring)

The bright side is the fertilizer is ready to use, there is no need for extra effort to mix.

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Why You Should Fertilize?

I cannot pass the topic without touching on the reasons why you have to fertilize.

Let’s use a figure of speech called a simile. You as a human being need food to survive, after years of eating and drinking, you gradually grow older. The same rule is applied to the plants, you won’t be able to get the best-flavored fruit if you avoid feeding the plant.

Even though the blueberries are in the best conditions which means it gets enough sunlight exposure throughout the day, a watering schedule is okay, and mulching is done, still, you aren’t satisfied with the result. Since you can’t survive without food, plants cannot survive without fertilizing.

Signs Of Overfertilization

Nutrient shortage signs are the most obvious indication that the soil underneath your blueberries does not get the optimum target pH. The main one is chlorotic leaves for blueberries.

The condition known as “interveinal chlorosis” is seen in chlorotic leaves. This indicates that while the leaf veins themselves are vivid green, the region between the leaf veins is yellow or pale green.

Another sign of inappropriate soil pH and associated nutrient deficits can be poor growth and production. Instead of being tinted with red or yellow, new and latest growth should be luxuriant and green.

A Brief Recap

We have reached the end of the article, hopefully, it was clear enough. Fertilization is an important part of growing plants. The needed supplies or food for blueberries are nitrogen, phosphorus, zinc micronutrient, calcium, and magnesium mainly. Every product that I mentioned above has a different amount in each ingredient.

In my experience, I would like to say the acidic soil is preferable, however, if that seems impossible, then you can move to add a blueberry acidifier. 

The best time for fertilization is spring, and when summer comes, blueberries are already nourished.

Further Reading

If you find out more about other interesting topics, I have good news for you. It wouldn’t take more than five minutes to read the article about why blueberry leaves are turning red or how many blueberries you can expect per plant.

Alternatively, check how to get rid of spider eggs in plant soil.

Until next time, stay tuned.


Natalia Michalska

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